Function gobject_sys::g_param_spec_variant

pub unsafe extern fn g_param_spec_variant(name: *const c_char,
                                          nick: *const c_char,
                                          blurb: *const c_char,
                                          type_: *const GVariantType,
                                          default_value: *mut GVariant,
                                          flags: GParamFlags)
                                          -> *mut GParamSpec