public Vector2f subtractLocal(float valX, float valY) {
        x -= valX;
        y -= valY;
        return this;
    }
Subtracts the specified amounts from the vector's components and returns
the (modified) current instance.

@param valX the amount to subtract from the X component
@param valY the amount to subtract from the Y component
@return the (modified) current instance (for chaining)
jme3-core/src/main/java/com/jme3/math/Vector2f.java