question: this method is used to isnumbernegative concode_field_sep PlaceHolder placeHolder concode_field_sep boolean isStringNullOrEmpty concode_elem_sep boolean isInteger concode_elem_sep boolean isNumberPositive concode_elem_sep boolean isNumberZero concode_elem_sep boolean isNull concode_elem_sep boolean isDouble
target: boolean function ( String arg0 ) { return ! isNumberPositive ( arg0 ) ; }