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.