Function gobject_sys::g_param_spec_double

pub unsafe extern fn g_param_spec_double(name: *const c_char,
                                         nick: *const c_char,
                                         blurb: *const c_char,
                                         minimum: c_double,
                                         maximum: c_double,
                                         default_value: c_double,
                                         flags: GParamFlags)
                                         -> *mut GParamSpec