Clear one single command

The "CommandMap" has the "clearCommands" you know.
It clear all commands that works ok, but i want just one command, and there's no any function for it.
So the problem is How can i clear just one command ?

Solved it.
Solution: New function in SimpleCommandMap.php:

Code:

public function clearCommand(Command $command, $fallbackPrefix) {
        $command->unregister($this);
        unset($this->knownCommands[$command->getName()]);

        $fallbackPrefix = strtolower(trim($fallbackPrefix));
        $aliases = $command->getAliases();
        foreach($aliases as $index => $alias){
            unset($this->knownCommands[$fallbackPrefix . ":" . $alias]);
            unset($this->knownCommands[$alias]);
        }
    }

And that means you have to either modify PocketMine source or use reflections.

Yea that's only way .. So sad that PocketMine doesn't have this function..