Macro pyo3::pyobject_native_type

macro_rules! pyobject_native_type {
    ($name: ty, $layout: path, $typeobject: expr, $module: expr, $checkfunction: path $(,$type_param: ident)*) => { ... };
    ($name: ty, $layout: path, $typeobject: expr, $checkfunction: path $(,$type_param: ident)*) => { ... };
}