def METHOD_NAME():
    """
    An explicit encoding may be set on headers in order to force a
    particular decoding.
    """
    raw_headers = [(b"Custom", "Code point: ☃".encode("utf-8"))]
    headers = httpx.Headers(raw_headers)
    headers.encoding = "iso-8859-1"
    assert dict(headers) == {"custom": "Code point: â\x98\x83"}
    assert headers.encoding == "iso-8859-1"