Function pyo3_ffi::PyUnicode_CopyCharacters

pub unsafe extern "C" fn PyUnicode_CopyCharacters(
    to: *mut PyObject,
    to_start: Py_ssize_t,
    from: *mut PyObject,
    from_start: Py_ssize_t,
    how_many: Py_ssize_t
) -> Py_ssize_t