pub unsafe extern "C" fn graphene_vec4_init(
v: *mut graphene_vec4_t,
x: c_float,
y: c_float,
z: c_float,
w: c_float,
) -> *mut graphene_vec4_t
pub unsafe extern "C" fn graphene_vec4_init(
v: *mut graphene_vec4_t,
x: c_float,
y: c_float,
z: c_float,
w: c_float,
) -> *mut graphene_vec4_t