public FromDefinition(String uri) {
   setUri(uri);
 }
 private static final void addNamespaceParameterFrom(FromDefinition fromDef, String namespace) {
   String old_uri = fromDef.getUri();
   String new_uri = addNamespaceParameter(old_uri, namespace);
   fromDef.setUri(new_uri);
   setEndpointUri(fromDef.getEndpoint(), namespace);
 }