ConstantNode constNode = (ConstantNode) fromNode;
Object value = constNode.getValue();
// The namaspace and name of the literal element will be set
// correctly in from.setLiteral().
XmlElement literalElement = XMLUtil.BUILDER.newFragment(GpelAssignCopyFrom.LITERAL_EL);
literalElement.addChild(value);
from.setLiteral(literalElement);
} else if (fromNode instanceof WSNode) {
String fromID = fromNode.getID();
WSComponent fromWsdlComponent = (WSComponent) fromNode.getComponent();