[ Version ( since = "6.0" ) ]
public bool is_valid (string? xml_file) throws Error
Tells if all the required values in this have been defined.
if xml_file is not null, the validity of this is tested
against that specification, and not against the current this's specification.
| this |
a ServerOperation widget |
| xml_file |
an XML specification file (see ServerOperation) or null |
|
true if this is valid |