public function commandExists($cmd) {
		return $this->loaded && isset($this->commands[$cmd]) && method_exists($this, $cmd);
	}
public function commandExists($cmd) {
		return $this->loaded && isset($this->commands[$cmd]) && method_exists($this, $cmd);
	}
public function commandExists ( $ cmd ) { return $ this -> loaded && isset ( $ this -> commands [ $ cmd ] ) && method_exists ( $ this , $ cmd ) ; }
Return true if command exists

@param  string  command name
@return bool
@author Dmitry (dio) Levashov
Return true if command exists