Returns helpful text about the different subcommands.
XGROUP
HELP
The XGROUP HELP
command returns a helpful text
describing the different subcommands.
Array reply: a list of sub-commands and their descriptions.
O(1)
@slow @stream
XACK, XADD, XAUTOCLAIM, XCLAIM, XDEL, XGROUP, XGROUP CREATE, XGROUP CREATECONSUMER, XGROUP DELCONSUMER, XGROUP DESTROY, XGROUP SETID, XINFO, XINFO CONSUMERS, XINFO GROUPS, XINFO HELP, XINFO STREAM, XLEN, XPENDING, XRANGE, XREAD, XREADGROUP, XREVRANGE, XSETID, XTRIM.