code: public void addDynamicElVarValue(final String name) {
          check(!dynamicElValues.contains(name),
                  "Duplicate dynamic el variable %s declaration", name);
          check(!staticElValues.containsKey(name),
                  "El variable %s can't be registered as dynamic, because static declaration already defined",
                  name);
          dynamicElValues.add(name);
      }
docs: Register dynamic query el variable value. Variable will be completely handled by extension.
  Registration is required to validated not handled variables.
  
  @param name variable name