code: public Matrix3x2f shearX(float yFactor, Matrix3x2f dest) {
          float nm10 = m00 * yFactor + m10;
          float nm11 = m01 * yFactor + m11;
          dest.m00 = m00;
          dest.m01 = m01;
          dest.m10 = nm10;
          dest.m11 = nm11;
          dest.m20 = m20;
          dest.m21 = m21;
          return dest;
      }
docs: Apply shearing to this matrix by shearing along the X axis using the Y axis factor <code>yFactor</code>,
  and store the result in <code>dest</code>.
  
  @param yFactor
  the factor for the Y component to shear along the X axis
  @param dest
  will hold the result
  @return dest