Returns %TRUE if a property has been registered, if @pspec or @parse_func are not %NULL, the #GParamSpec and parsing function will be respectively returned.
property name to look up
return location for the parse function
return location for the #GParamSpec
%TRUE if the property is registered, %FALSE otherwise
Deprecated: This code could only look up custom properties and those are deprecated.
3.0
See Implementation
Returns %TRUE if a property has been registered, if @pspec or @parse_func are not %NULL, the #GParamSpec and parsing function will be respectively returned.