module.exports = {
  kClose: Symbol('close'),
  kDestroy: Symbol('destroy'),
  kDispatch: Symbol('dispatch'),
  kUrl: Symbol('url'),
  kWriting: Symbol('writing'),
  kResuming: Symbol('resuming'),
  kQueue: Symbol('queue'),
  kConnect: Symbol('connect'),
  kConnecting: Symbol('connecting'),
  kHeadersList: Symbol('headers list'),
  kKeepAliveDefaultTimeout: Symbol('default keep alive timeout'),
  kKeepAliveMaxTimeout: Symbol('max keep alive timeout'),
  kKeepAliveTimeoutThreshold: Symbol('keep alive timeout threshold'),
  kKeepAliveTimeoutValue: Symbol('keep alive timeout'),
  kKeepAlive: Symbol('keep alive'),
  kHeadersTimeout: Symbol('headers timeout'),
  kBodyTimeout: Symbol('body timeout'),
  kServerName: Symbol('server name'),
  kLocalAddress: Symbol('local address'),
  kHost: Symbol('host'),
  kNoRef: Symbol('no ref'),
  kBodyUsed: Symbol('used'),
  kRunning: Symbol('running'),
  kBlocking: Symbol('blocking'),
  kPending: Symbol('pending'),
  kSize: Symbol('size'),
  kBusy: Symbol('busy'),
  kQueued: Symbol('queued'),
  kFree: Symbol('free'),
  kConnected: Symbol('connected'),
  kClosed: Symbol('closed'),
  kNeedDrain: Symbol('need drain'),
  kReset: Symbol('reset'),
  kDestroyed: Symbol.for('nodejs.stream.destroyed'),
  kMaxHeadersSize: Symbol('max headers size'),
  kRunningIdx: Symbol('running index'),
  kPendingIdx: Symbol('pending index'),
  kError: Symbol('error'),
  kClients: Symbol('clients'),
  kClient: Symbol('client'),
  kParser: Symbol('parser'),
  kOnDestroyed: Symbol('destroy callbacks'),
  kPipelining: Symbol('pipelining'),
  kSocket: Symbol('socket'),
  kHostHeader: Symbol('host header'),
  kConnector: Symbol('connector'),
  kStrictContentLength: Symbol('strict content length'),
  kMaxRedirections: Symbol('maxRedirections'),
  kMaxRequests: Symbol('maxRequestsPerClient'),
  kProxy: Symbol('proxy agent options'),
  kCounter: Symbol('socket request counter'),
  kInterceptors: Symbol('dispatch interceptors'),
  kMaxResponseSize: Symbol('max response size'),
  kHTTP2Session: Symbol('http2Session'),
  kHTTP2SessionState: Symbol('http2Session state'),
  kHTTP2BuildRequest: Symbol('http2 build request'),
  kHTTP1BuildRequest: Symbol('http1 build request'),
  kHTTP2CopyHeaders: Symbol('http2 copy headers'),
  kHTTPConnVersion: Symbol('http connection version'),
  kRetryHandlerDefaultRetry: Symbol('retry agent default retry'),
  kConstruct: Symbol('constructable')
}