public boolean isEnabled(ProjectDocument item, ProjectDocument[] selectedItems) {
    String sourceString = PluginServices.getFromClipboard();
    if (sourceString == null) return false;

    ProjectExtension projectExtension =
        (ProjectExtension) PluginServices.getExtension(ProjectExtension.class);
    Project project = projectExtension.getProject();
    String docType = ((ProjectWindow) projectExtension.getProjectWindow()).getDocumentSelected();

    return project.isValidXMLForImport(sourceString, docType);
  }