boolean function ( BlockConnector arg0 ) { if ( arg0 == null ) return true ; if ( arg0 . hasBlock ( ) ) return true ; return false ; }
an invalid connector is defined as one that is either 1 null , 2 belongs to an instance of a null block , 3 or already has a block connected to it . if a connector is invalid , this returns true . otherwise , return false . concode_field_sep PlaceHolder placeHolder concode_field_sep BlockLink connectBlocks concode_elem_sep boolean invalidBlock concode_elem_sep boolean invalidBlock