vertx / io.vertx.reactivex.ext.shell.command / CommandRegistry / registerCommand

# registerCommand

`open fun registerCommand(command: Command): CommandRegistry`

Like `io.vertx.reactivex.ext.shell.command.CommandRegistry#registerCommand`, without a completion handler.

### Parameters

`command` -

Return

`open fun registerCommand(command: Command, completionHandler: Handler<AsyncResult<Command>>): CommandRegistry`

Register a command

### Parameters

`command` - the command to register

`completionHandler` - notified when the command is registered

Return
a reference to this, so the API can be used fluently