raw details (from release v2.2.3):
{
"name": "rpc_pubsub_max_out_buffer_capacity",
"long": "rpc-pubsub-max-out-buffer-capacity",
"value_name": "BYTES",
"takes_value": "true",
"validator": "is_parsable::<usize>",
"help": "The maximum size in bytes to which the outgoing websocket buffer can grow."
}