@SuppressWarnings("unchecked")
    default T addAllFields(final Collection<? extends Field> fields) {
        fields.forEach(this::add);
        return (T) this;
    }
Adds all the specified {@link Field} members to this model.

@param fields  the new children
@return        a reference to this
common-parent/codegen/src/main/java/com/speedment/common/codegen/model/trait/HasFields.java