flutter detect click on only one child of column code example

Example: flutter onpressed Container

GestureDetector(
        onTap: (){
          print("Container clicked");
        },
        child: new Container(
          width: 500.0,
          padding: new EdgeInsets.fromLTRB(20.0, 40.0, 20.0, 40.0),
          color: Colors.green,
          child: new Column(
              children: [
                new Text("Ableitungen"),
              ]
          ),
        )
    );