Function lilv_sys::lilv_plugin_class_get_parent_uri

pub unsafe extern "C" fn lilv_plugin_class_get_parent_uri(
    plugin_class: *const LilvPluginClass
) -> *const LilvNode

Get the URI of this class' superclass. Returned value is owned by plugin_class and must not be freed by caller. Returned value may be NULL, if class has no parent.