import com.google.javascript.jscomp.graph.Annotation; //导入依赖的package包/类
@SuppressWarnings("unchecked")
public <A extends Annotation> A getAnnotation() {
  return (A) annotation;
}
 

import com.google.javascript.jscomp.graph.Annotation; //导入依赖的package包/类
public void setAnnotation(Annotation data) {
  annotation = data;
}
 

import com.google.javascript.jscomp.graph.Annotation; //导入依赖的package包/类
private static void checkAnnotations(
    Graph<String, String> graph, Annotatable a, Annotatable b) {
  final Annotation A = new Annotation() {};
  final Annotation B = new Annotation() {};

  // Initially null.
  assertNull(a.getAnnotation());
  assertNull(b.getAnnotation());

  // Test basic setting.
  a.setAnnotation(A);
  b.setAnnotation(B);
  assertSame(A, a.getAnnotation());
  assertSame(B, b.getAnnotation());

  // Test clearing.
  graph.clearEdgeAnnotations();
  graph.clearNodeAnnotations();
  assertNull(a.getAnnotation());
  assertNull(b.getAnnotation());

  a.setAnnotation(A);
  b.setAnnotation(B);
  // Pushing clears.
  graph.pushEdgeAnnotations();
  graph.pushNodeAnnotations();
  assertNull(a.getAnnotation());
  assertNull(b.getAnnotation());
  a.setAnnotation(B);
  b.setAnnotation(B);
  graph.pushEdgeAnnotations();
  graph.pushNodeAnnotations();
  a.setAnnotation(B);
  b.setAnnotation(A);

  // Test restoring then restoring old values with pop.
  assertSame(B, a.getAnnotation());
  assertSame(A, b.getAnnotation());
  graph.popEdgeAnnotations();
  graph.popNodeAnnotations();
  assertSame(B, a.getAnnotation());
  assertSame(B, b.getAnnotation());
  graph.popEdgeAnnotations();
  graph.popNodeAnnotations();
  assertSame(A, a.getAnnotation());
  assertSame(B, b.getAnnotation());
}
 

import com.google.javascript.jscomp.graph.Annotation; //导入依赖的package包/类
@Override
@SuppressWarnings("unchecked")
public <A extends Annotation> A getAnnotation() {
  return (A) annotation;
}
 

import com.google.javascript.jscomp.graph.Annotation; //导入依赖的package包/类
@Override
public void setAnnotation(Annotation data) {
  annotation = data;
}
 

import com.google.javascript.jscomp.graph.Annotation; //导入依赖的package包/类
@Override
public Annotation getAnnotation() {
  return annotation;
}