import com.intellij.navigation.NavigationItemFileStatus; //导入依赖的package包/类
@Override
public FileStatus getFileStatus() {
  for(BasePsiNode<? extends PsiElement> child: myChildren) {
    final PsiElement value = child.getValue();
    if (value == null || !value.isValid()) continue;
    final FileStatus fileStatus = NavigationItemFileStatus.get(child);
    if (fileStatus != FileStatus.NOT_CHANGED) {
      return fileStatus;
    }
  }
  return FileStatus.NOT_CHANGED;
}
 

import com.intellij.navigation.NavigationItemFileStatus; //导入依赖的package包/类
@Nullable
@Override
public FileStatus getFileStatus()
{
	T element = myPointer.getElement();
	if(element == null)
	{
		return null;
	}
	return NavigationItemFileStatus.get((NavigationItem) element);
}
 

import com.intellij.navigation.NavigationItemFileStatus; //导入依赖的package包/类
@Override
public FileStatus getFileStatus() {
  return isValid() ? NavigationItemFileStatus.get(getPsiClass()) : null;
}
 

import com.intellij.navigation.NavigationItemFileStatus; //导入依赖的package包/类
@Override
public FileStatus getFileStatus() {
  PsiFile file = myMethodPointer.getContainingFile();
  return file == null ? null : NavigationItemFileStatus.get(file);
}
 

import com.intellij.navigation.NavigationItemFileStatus; //导入依赖的package包/类
@Override
public FileStatus getFileStatus() {
  return isValid() ? NavigationItemFileStatus.get(getElement()) : null;
}
 

import com.intellij.navigation.NavigationItemFileStatus; //导入依赖的package包/类
@Override
public FileStatus getFileStatus() {
  return isValid() ? NavigationItemFileStatus.get(getMethod()) : null;
}