docs: public void createPackageContents() {
  		if (isCreated) return;
  		isCreated = true;
  
  		// Create classes and their features
  		documentRootEClass = createEClass(DOCUMENT_ROOT);
  		createEAttribute(documentRootEClass, DOCUMENT_ROOT__MIXED);
  		createEReference(documentRootEClass, DOCUMENT_ROOT__XMLNS_PREFIX_MAP);
  		createEReference(documentRootEClass, DOCUMENT_ROOT__XSI_SCHEMA_LOCATION);
  		createEAttribute(documentRootEClass, DOCUMENT_ROOT__BACKGROUND_COLOR);
  		createEAttribute(documentRootEClass, DOCUMENT_ROOT__BORDER_COLOR);
  		createEAttribute(documentRootEClass, DOCUMENT_ROOT__COLOR);
  
  		// Create data types
  		hexColorEDataType = createEDataType(HEX_COLOR);
  	}