code: static void generateMethodsForElement(ClassWriter classWriter, XsdElement child, String classType, String apiName) {
          generateMethodsForElement(classWriter, child.getName(), classType, apiName, new String[]{});
      }
docs: Generates the methods in a given class for a given child that the class is allowed to have.
  @param classWriter The {@link ClassWriter} where the method will be written.
  @param child The child of the element which generated the class. Their name represents a method.
  @param classType The type of the class which contains the children elements.
  @param apiName The name of the generated fluent interface.