Queries the location in the CSS where @property was defined for the
current @context. Note that the state to be queried is taken from
gtk_style_context_get_state().
If the location is not available, %NULL will be returned. The
location might not be available for various reasons, such as the
property being overridden, @property not naming a supported CSS
property or tracking of definitions being disabled for performance
reasons.
Shorthand CSS properties cannot be queried for a location and will
always return %NULL.
Queries the location in the CSS where @property was defined for the current @context. Note that the state to be queried is taken from gtk_style_context_get_state().
If the location is not available, %NULL will be returned. The location might not be available for various reasons, such as the property being overridden, @property not naming a supported CSS property or tracking of definitions being disabled for performance reasons.
Shorthand CSS properties cannot be queried for a location and will always return %NULL.