// file: mm_delete_0.cc// // isip include files//#include "memory_manager.h"#include "memory_manager_constants.h"#include "lex_node.h"// method: delete_cc//// arguments://  Lex_node* lxn : (input) the node to be put back in the list//// return: a logical_1 indicating success//// this method takes the input lex node and puts it in the free// lex nodes list//logical_1 Memory_manager::delete_cc(Lex_node* lxn_a) {  // get a link node to hold this lex node  //  Link_node* node = new_node_cc();    // put the lex node in this  //  node->set_item_cc((void_p)lxn_a);    // insert the incoming node in the node list  //  node->insert_cc(lex_list_d);  lex_list_d = node;    // increment free lex node count  //  lex_count_d++;  // exit gracefully  //  return ISIP_TRUE;}