question: more complex version of join . if you find you want to use this , you should implement ilatticeoperations instead . concode_field_sep PlaceHolder placeHolder concode_field_sep LE bottom concode_elem_sep LE copy concode_elem_sep boolean atLeastAsPrecise concode_elem_sep boolean atLeastAsPrecise
target: LE function ( LE arg0 , LE arg1 , ASTNode arg2 ) { return join ( arg0 , arg1 ) ; }