openFrameworks - ofParameterGroup cast parameters from group callback

ofApp.cpp

ofApp::Changed_params(ofAbstractParameter &e)
{
    
	//bool
	if (e.type() == typeid(ofParameter<bool>).name())
	{
		ofParameter<bool> b = e.cast<bool>();

		if (name == "BANG_1")
		{
			if (b)
			{
				ofLogNotice("ofApp") << "\t\t\t\t" << name << " !";
			}
		}

		if (name == "BANG_2")
		{
			if (b)
			{
				ofLogNotice("ofApp") << "\t\t\t\t" << name << " !";
			}
		}
	}
    
    if(e.type() == typeid(ofParameter<int>).name())
    {
        ofParameter<int> p = e.cast<int>();
        ...
    }
    else if(e.type() == typeid(ofParameter<float>).name()
    {
        ofParameter<float> p = e.cast<float>();
        ...
    }
    else if(e.type() == typeid(ofParameter<ofVec3f>).name()
    {
        ofParameter<ofVec3f> p = e.cast<ofVec3f>();
        ...
    }
    
    ofParameter<float> aProp = e.getFloat("opacity");
    ofParameter<float> prop = e.cast<float>();
    
    if (name == "Name")
    {
        string _name = e.cast<string>();
    }
}