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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def parse_headers( self, lines: List[bytes] ) -> Tuple['CIMultiDictProxy[str]', RawHeaders, Optional[bool], Optional[str], bool, bool]: """Parses RFC 5322 headers from a stream. Line continuations are supported. Returns list of header name and value pairs. Header name is in upper case. """

        headers, raw_headers = self._headers_parser.parse_headers(lines)
        close_conn = None
        encoding = None
        upgrade = False
        chunked = False

        # keep-alive
        conn = headers.get(hdrs.CONNECTION)
        if conn:
            v = conn.lower()
            if v == 'close':
                close_conn = True
            elif v == 'keep-alive':
                close_conn = False
            elif v == 'upgrade':
                upgrade = True

        # encoding
        enc = headers.get(hdrs.CONTENT_ENCODING)
        if enc:
            enc = enc.lower()
            if enc in ('gzip', 'deflate', 'br'):
                encoding = enc

        # chunking
        te = headers.get(hdrs.TRANSFER_ENCODING)
        if te and 'chunked' in te.lower():
            chunked = True

        return (headers, raw_headers, close_conn, encoding, upgrade, chunked)