Open abstract free instantiable class
<abstract-socket>, <external-stream>
direction: Specifies the direction of the stream. It must be one of #"input", #"output", and "#input-output". This keyword is an inherited streams class keyword. See the Streams library documentation in the System and I/O library reference for a full description.
element-type: An instance of <class>. Useful values are <byte-character> and <byte>. This keyword is an inherited streams class keyword. See the Streams library documentation in the System and I/O library reference for a full description.