import com.intellij.xml.XmlTagNameProvider; //导入依赖的package包/类
public static LookupElement[] getTagNameVariants(final @NotNull XmlTag tag, final String prefix) {
  List<LookupElement> elements = new ArrayList<LookupElement>();
  for (XmlTagNameProvider tagNameProvider : XmlTagNameProvider.EP_NAME.getExtensions()) {
    tagNameProvider.addTagNameVariants(elements, tag, prefix);
  }
  return elements.toArray(new LookupElement[elements.size()]);
}
 

import com.intellij.xml.XmlTagNameProvider; //导入依赖的package包/类
public static LookupElement[] getTagNameVariants(final @NotNull XmlTag tag, final String prefix)
{
	List<LookupElement> elements = new ArrayList<>();
	for(XmlTagNameProvider tagNameProvider : XmlTagNameProvider.EP_NAME.getExtensions())
	{
		tagNameProvider.addTagNameVariants(elements, tag, prefix);
	}
	return elements.toArray(new LookupElement[elements.size()]);
}