Value Name Constant
    0x00 No Error http2.constants.NGHTTP2_NO_ERROR
    0x01 Protocol Error http2.constants.NGHTTP2_PROTOCOL_ERROR
    0x02 Internal Error http2.constants.NGHTTP2_INTERNAL_ERROR
    0x03 Flow Control Error http2.constants.NGHTTP2_FLOW_CONTROL_ERROR
    0x04 Settings Timeout http2.constants.NGHTTP2_SETTINGS_TIMEOUT
    0x05 Stream Closed http2.constants.NGHTTP2_STREAM_CLOSED
    0x06 Frame Size Error http2.constants.NGHTTP2_FRAME_SIZE_ERROR
    0x07 Refused Stream http2.constants.NGHTTP2_REFUSED_STREAM
    0x08 Cancel http2.constants.NGHTTP2_CANCEL
    0x09 Compression Error http2.constants.NGHTTP2_COMPRESSION_ERROR
    0x0a Connect Error http2.constants.NGHTTP2_CONNECT_ERROR
    0x0b Enhance Your Calm http2.constants.NGHTTP2_ENHANCE_YOUR_CALM
    0x0c Inadequate Security http2.constants.NGHTTP2_INADEQUATE_SECURITY
    0x0d HTTP/1.1 Required http2.constants.NGHTTP2_HTTP_1_1_REQUIRED

    The 'timeout' event is emitted when there is no activity on the Server for a given number of milliseconds set using http2server.setTimeout().