Property :: hasInstances - Has property instances
The function returns, whether a property has instances or not, i.e. whether count() > 0. In case of filters being defined, the function checks, whether the collection has valid instances for the filter condition. Attributes are always considered having instances, regardless whether the attribute content is "empty" or not.
Return value: Success ( bool )
The value is true when the function was executed successfully. Otherwise the value is set to false.