null-safe equivalent of a.equals b . concode_field_sep PlaceHolder placeHolder concode_field_sep int compare concode_elem_sep boolean deepEquals concode_elem_sep int hashCode concode_elem_sep T requireNonNull concode_elem_sep T requireNonNull concode_elem_sep String toString concode_elem_sep String toString concode_elem_sep int hash
boolean function ( Object arg0 , Object arg1 ) { return ( arg0 == null ) ? ( arg1 == null ) : arg0 . equals ( arg1 ) ; }