public static ASTNode createPrefixedNode(PsiManager manager, String prefix, String localPart) {
    final PsiFileFactory f = PsiFileFactory.getInstance(manager.getProject());
    final RncFile file = (RncFile)f.createFileFromText("dummy.rnc", RncFileType.getInstance(), "element " + prefix + ":" + localPart + " { text }");

    final ASTNode node = findFirstGrammarNode(file);
    final ASTNode nameClassNode = node.findChildByType(RncElementTypes.NAME_CLASS);
    assert nameClassNode != null;

    final ASTNode astNode = nameClassNode.findChildByType(RncElementTypes.NAME);
    assert astNode != null;
    return astNode;
  }
public static ASTNode createPrefixedNode(PsiManager manager, String prefix, String localPart)