public void add ( TYPE_1 key , TYPE_2 value ) { java.util.ArrayList < TYPE_2 > list = this . get ( key ) ; if ( list == null ) { list = new java.util.ArrayList < TYPE_2 > ( ) ; this . put ( key , list ) ; } list . add ( value ) ; }

public java.util.ArrayList < TYPE_2 > add ( TYPE_1 key ) { java.util.ArrayList < TYPE_2 > list = this . get ( key ) ; if ( list == null ) { list = new java.util.ArrayList < TYPE_2 > ( ) ; this . put ( key , list ) ; } return list ; }
