code: @SuppressWarnings("unchecked")
  	public EList<IfcMaterialLayer> getMaterialLayers() {
  		return (EList<IfcMaterialLayer>) eGet(Ifc2x3tc1Package.Literals.IFC_MATERIAL_LAYER_SET__MATERIAL_LAYERS, true);
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated