question: validate a user - or group-name . tests that it 's a valid linux name starts w/alpha , followed by alphanumeric _ - concode_field_sep PlaceHolder placeHolder concode_field_sep ValidatorResult validateContent concode_elem_sep boolean validateUGID concode_elem_sep String regexEscape concode_elem_sep ValidatorResult validatePath
target: boolean function ( String arg0 ) { return ( arg0 != null && arg0 . matches ( "srini_string" ) ) ; }