code: @XmlElementDecl(namespace = "http://www.w3.org/1998/Math/MathML", name = "matrixrow")
      public JAXBElement<MatrixrowType> createMatrixrow(MatrixrowType value) {
          return new JAXBElement<MatrixrowType>(_Matrixrow_QNAME, MatrixrowType.class, null, value);
      }
docs: Create an instance of {@link JAXBElement }{@code <}{@link MatrixrowType }{@code >}}