/// <inheritdoc />
 public Element Child(Predicate <Element> predicate)
 {
     return(ChildElements.Element(predicate));
 }
 /// <inheritdoc />
 public Element Child(Regex elementId)
 {
     return(ChildElements.Element(elementId));
 }
 /// <inheritdoc />
 public Element Child(Constraint findBy)
 {
     return(ChildElements.Element(findBy));
 }
 /// <inheritdoc />
 public Element Child(string elementId)
 {
     return(ChildElements.Element(elementId));
 }