Macro pyo3::pyobject_native_type_core

macro_rules! pyobject_native_type_core {
    ($name:ty, $typeobject:expr, #module=$module:expr $(, #checkfunction=$checkfunction:path)? $(;$generics:ident)*) => { ... };
    ($name:ty, $typeobject:expr $(, #checkfunction=$checkfunction:path)? $(;$generics:ident)*) => { ... };
}

Declares all of the boilerplate for Python types.