pub unsafe extern "C" fn graphene_matrix_init_from_matrix(
m: *mut graphene_matrix_t,
src: *const graphene_matrix_t,
) -> *mut graphene_matrix_t
pub unsafe extern "C" fn graphene_matrix_init_from_matrix(
m: *mut graphene_matrix_t,
src: *const graphene_matrix_t,
) -> *mut graphene_matrix_t