code: public Matrix3x2f shearY(float xFactor, Matrix3x2f dest) {
          float nm00 = m00 + m10 * xFactor;
          float nm01 = m01 + m11 * xFactor;
          dest.m00 = nm00;
          dest.m01 = nm01;
          dest.m10 = m10;
          dest.m11 = m11;
          dest.m20 = m20;
          dest.m21 = m21;
          return dest;
      }
docs: Apply shearing to this matrix by shearing along the Y axis using the X axis factor <code>xFactor</code>,
  and store the result in <code>dest</code>.
  
  @param xFactor
  the factor for the X component to shear along the Y axis
  @param dest
  will hold the result
  @return dest