private Futures() {}

  /**
   * Creates a {@code ListenableFuture} which has its value set immediately upon construction. The
   * getters just return the value. This {@code Future} can't be canceled or timed out and its
   * {@code isDone()} method always returns {@code true}.
   */
  public static <V extends @Nullable Object> ListenableFuture<V> immediateFuture(
      @ParametricNullness V value) {
    if (value == null) {

	55:  "no buffer space available",
	56:  "socket is already connected",
	57:  "socket is not connected",
	58:  "can't send after socket shutdown",
	59:  "too many references: can't splice",
	60:  "operation timed out",
	61:  "connection refused",
	62:  "too many levels of symbolic links",
	63:  "file name too long",
	64:  "host is down",
	65:  "no route to host",
	66:  "directory not empty",

	55:  "no buffer space available",
	56:  "socket is already connected",
	57:  "socket is not connected",
	58:  "can't send after socket shutdown",
	59:  "too many references: can't splice",
	60:  "operation timed out",
	61:  "connection refused",
	62:  "too many levels of symbolic links",
	63:  "file name too long",
	64:  "host is down",
	65:  "no route to host",
	66:  "directory not empty",

	return c.conn.RemoteAddr()
}

// SetDeadline sets the read and write deadlines associated with the connection.
// A zero value for t means [Conn.Read] and [Conn.Write] will not time out.
// After a Write has timed out, the TLS state is corrupt and all future writes will return the same error.
func (c *Conn) SetDeadline(t time.Time) error {
	return c.conn.SetDeadline(t)
}

	133: "transport endpoint is already connected",
	134: "transport endpoint is not connected",
	143: "cannot send after socket shutdown",
	144: "too many references: cannot splice",
	145: "connection timed out",
	146: "connection refused",
	147: "host is down",
	148: "no route to host",
	149: "operation already in progress",
	150: "operation now in progress",
	151: "stale NFS file handle",
}

	106: "transport endpoint is already connected",
	107: "transport endpoint is not connected",
	108: "cannot send after transport endpoint shutdown",
	109: "too many references: cannot splice",
	110: "connection timed out",
	111: "connection refused",
	112: "host is down",
	113: "no route to host",
	114: "operation already in progress",
	115: "operation now in progress",
	116: "stale NFS file handle",

	106: "transport endpoint is already connected",
	107: "transport endpoint is not connected",
	108: "cannot send after transport endpoint shutdown",
	109: "too many references: cannot splice",
	110: "connection timed out",
	111: "connection refused",
	112: "host is down",
	113: "no route to host",
	114: "operation already in progress",
	115: "operation now in progress",
	116: "stale NFS file handle",

	55: "no buffer space available",
	56: "socket is already connected",
	57: "socket is not connected",
	58: "can't send after socket shutdown",
	59: "too many references: can't splice",
	60: "connection timed out",
	61: "connection refused",
	62: "too many levels of symbolic links",
	63: "file name too long",
	64: "host is down",
	65: "no route to host",
	66: "directory not empty",
	67: "too many processes",

	55: "no buffer space available",
	56: "socket is already connected",
	57: "socket is not connected",
	58: "can't send after socket shutdown",
	59: "too many references: can't splice",
	60: "operation timed out",
	61: "connection refused",
	62: "too many levels of symbolic links",
	63: "file name too long",
	64: "host is down",
	65: "no route to host",
	66: "directory not empty",
	67: "too many processes",

	55: "no buffer space available",
	56: "socket is already connected",
	57: "socket is not connected",
	58: "can't send after socket shutdown",
	59: "too many references: can't splice",
	60: "operation timed out",
	61: "connection refused",
	62: "too many levels of symbolic links",
	63: "file name too long",
	64: "host is down",
	65: "no route to host",
	66: "directory not empty",
	67: "too many processes",