@XmlElementDecl(namespace = "http://www.opengis.net/gml", name = "covariance")
    public JAXBElement<Double> createCovariance(Double value) {
        return new JAXBElement<Double>(_Covariance_QNAME, Double.class, null, value);
    }
@ XmlElementDecl ( namespace = "http://www.opengis.net/gml" , name = "covariance" ) public JAXBElement < Double > createCovariance ( Double value ) { return new JAXBElement < Double > ( _Covariance_QNAME , Double . class , null , value ) ; }
Create an instance of {@link JAXBElement }{@code <}{@link Double }{@code >}

@param value
Java instance representing xml element's value.
@return
the new instance of {@link JAXBElement }{@code <}{@link Double }{@code >}