public static XmlProcessingInstruction createSingleImportInstruction(String qualifiedName, Project project) {
    final String importText = "<?import " + qualifiedName + "?>";
    final PsiElement child =
      PsiFileFactory.getInstance(project).createFileFromText("a.fxml", XMLLanguage.INSTANCE, importText).getFirstChild();
    return PsiTreeUtil.findChildOfType(child, XmlProcessingInstruction.class);
  }
public static XmlProcessingInstruction createSingleImportInstruction(String qualifiedName, Project project)