Changing TransformListener's transform

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Hi,

So I'm trying to change the transform that I'm getting from a transform listener, but it doesn't seem to change.

When trying to set the values, they don't change. Here I'm declaring a const variable, since getRotation.getX returns a const:

const double scalarX = transform.getRotation().getX() + 0.1;
transform.getRotation().setX(scalarX);

Transform is acting like it's const, but it's not and so isn't getRotation, but I still can't change the values.

tf::StampedTransform transform;
listener.lookupTransform(*camera_depth, *base_link, ros::Time(0), transform);

cout << "Before added scalar: " << transform.getRotation().getX() << endl;

const double scalarX = transform.getRotation().getX() + 0.1;
transform.getRotation().setX(scalarX);
cout << "After added scalar: " << transform.getRotation().getX() << endl;