public Quaternion multLocal(float scalar) {
        w *= scalar;
        x *= scalar;
        y *= scalar;
        z *= scalar;
        return this;
    }
Multiplies by the scalar argument and returns the (modified) current
instance.

@param scalar the scaling factor
@return the (modified) current instance (for chaining)
jme3-core/src/main/java/com/jme3/math/Quaternion.java