* Definition / model of YANG {@link DeclaredStatement} and {@link EffectiveStatement}.
*
* Statement concept is defined in RFC6020 section 6.3:
* Definition / model of YANG {@link DeclaredStatement} and {@link EffectiveStatement}.
*
* Statement concept is defined in RFC6020 section 6.3:
* Returns class which represents derived behaviour from supplied statement.
*
* This class should be interface, which defines convenience access to
* Returns class which represents derived behaviour from supplied statement.
*
* This class should be interface, which defines convenience access to