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