src/org/nutz/repo/org/objectweb/asm/AnnotationVisitor.java
public AnnotationVisitor visitAnnotation(String name, String desc) {
        if (av != null) {
            return av.visitAnnotation(name, desc);
        }
        return null;
    }
public AnnotationVisitor visitAnnotation(String name, String desc) {
        if (av != null) {
            return av.visitAnnotation(name, desc);
        }
        return null;
    }
Visits a nested annotation value of the annotation.

@param name
the value name.
@param desc
the class descriptor of the nested annotation class.
@return a visitor to visit the actual nested annotation value, or
<tt>null</tt> if this visitor is not interested in visiting this
nested annotation. <i>The nested annotation value must be fully
visited before calling other methods on this annotation
visitor</i>.