pub unsafe extern "C" fn clutter_state_set_key(
state: *mut ClutterState,
source_state_name: *const c_char,
target_state_name: *const c_char,
object: *mut GObject,
property_name: *const c_char,
mode: c_uint,
value: *const GValue,
pre_delay: c_double,
post_delay: c_double,
) -> *mut ClutterState