code: public Matrix4x3d zero() {
          m00 = 0.0;
          m01 = 0.0;
          m02 = 0.0;
          m10 = 0.0;
          m11 = 0.0;
          m12 = 0.0;
          m20 = 0.0;
          m21 = 0.0;
          m22 = 0.0;
          m30 = 0.0;
          m31 = 0.0;
          m32 = 0.0;
          properties = 0;
          return this;
      }
docs: Set all the values within this matrix to 0.
  
  @return this