@SuppressWarnings("unchecked")
    default T add(final Generic generic) {
        getGenerics().add(generic);
        return (T) this;
    }
Adds the specified {@link Generic} to this model.

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