public TYPE_1 METHOD_1 ( TYPE_1 node ) { return METHOD_2 ( node , new java.util.HashMap < java.lang.Integer , TYPE_1 > ( ) ) ; } 

public TYPE_1 METHOD_1 ( TYPE_1 node ) { if ( node == null ) { return null ; } return METHOD_2 ( node , new java.util.HashMap < java.lang.Integer , TYPE_1 > ( ) ) ; } 
