code: public Matrix4f scaleLocal(float x, float y, float z) {
          return scaleLocal(x, y, z, thisOrNew());
      }
docs: Pre-multiply scaling to this matrix by scaling the base axes by the given x,
  y and z factors.
  <p>
  If <code>M</code> is <code>this</code> matrix and <code>S</code> the scaling matrix,
  then the new matrix will be <code>S * M</code>. So when transforming a
  vector <code>v</code> with the new matrix by using <code>S * M * v</code>, the
  scaling will be applied last!
  
  @param x
  the factor of the x component
  @param y
  the factor of the y component
  @param z
  the factor of the z component
  @return a matrix holding the result