@SuppressWarnings("unchecked")
    default T add(ClassOrInterface<?> member) {
        getClasses().add(member.setParent(this));
        return (T) this;
    }
Adds the specified {@link ClassOrInterface} to this model.

@param member  the new child
@return        a reference to this
common-parent/codegen/src/main/java/com/speedment/common/codegen/model/trait/HasClasses.java