code: @SuppressWarnings("unchecked")
  	@Override
  	public EList<IfcClassificationSelect> getMaterialClassifications() {
  		return (EList<IfcClassificationSelect>) eGet(
  				Ifc4Package.Literals.IFC_MATERIAL_CLASSIFICATION_RELATIONSHIP__MATERIAL_CLASSIFICATIONS, true);
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated