* @param msg the message string to be logged
   */
  public void info(String msg);
  

  /**
   * Log a message at the INFO level according to the specified format
   * and argument.
   * 
   * <p>This form avoids superfluous object creation when the logger
   * is disabled for the INFO level. </p>
   *
   * @param format the format string 
   * @param arg  the argument
   */
  public void info(String format, Object arg);

  
  /**
   * Log a message at the INFO level according to the specified format
   * and arguments.
   * 
   * <p>This form avoids superfluous object creation when the logger
   * is disabled for the INFO level. </p>
   *
   * @param format the format string
   * @param arg1  the first argument
   * @param arg2  the second argument
   */
  public void info(String format, Object arg1, Object arg2);

  /**
   * Log a message at the INFO level according to the specified format
   * and arguments.
   * 
   * <p>This form avoids superfluous object creation when the logger
   * is disabled for the INFO level. </p>
   *
   * @param format the format string
   * @param argArray an array of arguments
   */
  public void info(String format, Object[] argArray);
  
  /**
   * Log an exception (throwable) at the INFO level with an
   * accompanying message. 
   * 
   * @param msg the message accompanying the exception
   * @param t the exception (throwable) to log 
   */
  public void info(String msg, Throwable t);

  /**
   * Similar to {@link #isInfoEnabled()} method except that the marker
   * data is also taken into consideration.
   *
   * @param marker The marker data to take into consideration
   */
  public boolean isInfoEnabled(Marker marker);
  
  /**
   * Log a message with the specific Marker at the INFO level.
   * 
   * @param marker The marker specific to this log statement
   * @param msg the message string to be logged
   */
  public void info(Marker marker, String msg);
  
  /**
   * This method is similar to {@link #info(String, Object)} method except that the 
   * marker data is also taken into consideration.
   *
   * @param marker the marker data specific to this log statement
   * @param format the format string
   * @param arg the argument
   */
  public void info(Marker marker, String format, Object arg);
  
  /**
   * This method is similar to {@link #info(String, Object, Object)}
   * method except that the marker data is also taken into
   * consideration.
   * 
   * @param marker the marker data specific to this log statement
   * @param format  the format string
   * @param arg1  the first argument
   * @param arg2  the second argument
   */
  public void info(Marker marker, String format, Object arg1, Object arg2);  
  
  
  /**
   * This method is similar to {@link #info(String, Object[])}
   * method except that the marker data is also taken into
   * consideration.
   *
   * @param marker the marker data specific to this log statement
   * @param format  the format string
   * @param argArray an array of arguments
   */
  public void info(Marker marker, String format, Object[] argArray);

  
  /**
   * This method is similar to {@link #info(String, Throwable)} method
   * except that the marker data is also taken into consideration.
   * 
   * @param marker the marker data for this log statement
   * @param msg the message accompanying the exception
   * @param t the exception (throwable) to log
   */ 
  public void info(Marker marker, String msg, Throwable t); 

  
  /**
   * Is the logger instance enabled for the WARN level?
   * @return True if this Logger is enabled for the WARN level,
   * false otherwise.
   */
  public boolean isWarnEnabled();

  /**
   * Log a message at the WARN level.
   *
   * @param msg the message string to be logged
   */
  public void warn(String msg);

 /**
   * Log a message at the WARN level according to the specified format
   * and argument.
   * 
   * <p>This form avoids superfluous object creation when the logger
   * is disabled for the WARN level. </p>
   *
   * @param format the format string 
   * @param arg  the argument
   */
  public void warn(String format, Object arg);

  
  /**
   * Log a message at the WARN level according to the specified format
   * and arguments.
   * 
   * <p>This form avoids superfluous object creation when the logger
   * is disabled for the WARN level. </p>
   *
   * @param format the format string
   * @param argArray an array of arguments
   */
  public void warn(String format, Object[] argArray);
  
  /**
   * Log a message at the WARN level according to the specified format
   * and arguments.
   * 
   * <p>This form avoids superfluous object creation when the logger
   * is disabled for the WARN level. </p>
   *
   * @param format the format string
   * @param arg1  the first argument
   * @param arg2  the second argument
   */
  public void warn(String format, Object arg1, Object arg2);
  
  /**
   * Log an exception (throwable) at the WARN level with an
   * accompanying message. 
   * 
   * @param msg the message accompanying the exception
   * @param t the exception (throwable) to log 
   */
  public void warn(String msg, Throwable t);
  

  /**
   * Similar to {@link #isWarnEnabled()} method except that the marker
   * data is also taken into consideration.
   *
   * @param marker The marker data to take into consideration
   */
  public boolean isWarnEnabled(Marker marker);
 
  /**
   * Log a message with the specific Marker at the WARN level.
   * 
   * @param marker The marker specific to this log statement
   * @param msg the message string to be logged
   */
  public void warn(Marker marker, String msg); 
  
  /**
   * This method is similar to {@link #warn(String, Object)} method except that the 
   * marker data is also taken into consideration.
   * 
   * @param marker the marker data specific to this log statement
   * @param format the format string
   * @param arg the argument
   */
  public void warn(Marker marker, String format, Object arg);
  
  /**
   * This method is similar to {@link #warn(String, Object, Object)}
   * method except that the marker data is also taken into
   * consideration.
   * 
   * @param marker the marker data specific to this log statement
   * @param format  the format string
   * @param arg1  the first argument
   * @param arg2  the second argument
   */
  public void warn(Marker marker, String format, Object arg1, Object arg2);  
  
  /**
   * This method is similar to {@link #warn(String, Object[])}
   * method except that the marker data is also taken into
   * consideration.
   *
   * @param marker the marker data specific to this log statement
   * @param format  the format string
   * @param argArray an array of arguments
   */
  public void warn(Marker marker, String format, Object[] argArray);

  
  /**
   * This method is similar to {@link #warn(String, Throwable)} method
   * except that the marker data is also taken into consideration.
   * 
   * @param marker the marker data for this log statement
   * @param msg the message accompanying the exception
   * @param t the exception (throwable) to log
   */ 
  public void warn(Marker marker, String msg, Throwable t); 
  

  /**
   * Is the logger instance enabled for the ERROR level?
   * @return True if this Logger is enabled for the ERROR level,
   * false otherwise.
   */
  public boolean isErrorEnabled();
  
  /**
   * Log a message at the ERROR level.
   *
   * @param msg the message string to be logged
   */
  public void error(String msg);
  
 /**
   * Log a message at the ERROR level according to the specified format
   * and argument.
   * 
   * <p>This form avoids superfluous object creation when the logger
   * is disabled for the ERROR level. </p>
   *
   * @param format the format string 
   * @param arg  the argument
   */
  public void error(String format, Object arg);

  /**
   * Log a message at the ERROR level according to the specified format
   * and arguments.
   * 
   * <p>This form avoids superfluous object creation when the logger
   * is disabled for the ERROR level. </p>
   *
   * @param format the format string
   * @param arg1  the first argument
   * @param arg2  the second argument
   */
  public void error(String format, Object arg1, Object arg2);

  /**
   * Log a message at the ERROR level according to the specified format
   * and arguments.
   * 
   * <p>This form avoids superfluous object creation when the logger
   * is disabled for the ERROR level. </p>
   *
   * @param format the format string
   * @param argArray an array of arguments
   */
  public void error(String format, Object[] argArray);
  
  /**
   * Log an exception (throwable) at the ERROR level with an
   * accompanying message. 
   * 
   * @param msg the message accompanying the exception
   * @param t the exception (throwable) to log
   */
  public void error(String msg, Throwable t);


  /**
   * Similar to {@link #isErrorEnabled()} method except that the
   * marker data is also taken into consideration.
   *
   * @param marker The marker data to take into consideration
   */
  public boolean isErrorEnabled(Marker marker);
  
  /**
   * Log a message with the specific Marker at the ERROR level.
   * 
   * @param marker The marker specific to this log statement
   * @param msg the message string to be logged
   */
  public void error(Marker marker, String msg); 
  
  /**
   * This method is similar to {@link #error(String, Object)} method except that the 
   * marker data is also taken into consideration.
   * 
   * @param marker the marker data specific to this log statement
   * @param format the format string
   * @param arg the argument
   */
  public void error(Marker marker, String format, Object arg);
  
  /**
   * This method is similar to {@link #error(String, Object, Object)}
   * method except that the marker data is also taken into
   * consideration.
   * 
   * @param marker the marker data specific to this log statement
   * @param format  the format string
   * @param arg1  the first argument
   * @param arg2  the second argument
   */
  public void error(Marker marker, String format, Object arg1, Object arg2);  
  
  /**
   * This method is similar to {@link #error(String, Object[])}
   * method except that the marker data is also taken into
   * consideration.
   *
   * @param marker the marker data specific to this log statement
   * @param format  the format string
   * @param argArray an array of arguments
   */
  public void error(Marker marker, String format, Object[] argArray);

  
  /**
   * This method is similar to {@link #error(String, Throwable)}
   * method except that the marker data is also taken into
   * consideration.
   * 
   * @param marker the marker data specific to this log statement
   * @param msg the message accompanying the exception
   * @param t the exception (throwable) to log
   */ 
  public void error(Marker marker, String msg, Throwable t);

}