code: protected void addReceiverAnnotations(ExecutableMemberDoc member, Type rcvrType,
              AnnotationDesc[] descList, Content tree) {
          writer.addReceiverAnnotationInfo(member, descList, tree);
          tree.addContent(writer.getSpace());
          tree.addContent(rcvrType.typeName());
          LinkInfoImpl linkInfo = new LinkInfoImpl(configuration,
                  LinkInfoImpl.Kind.CLASS_SIGNATURE, rcvrType);
          tree.addContent(writer.getTypeParameterLinks(linkInfo));
          tree.addContent(writer.getSpace());
          tree.addContent("this");
      }
docs: Add the receiver annotations information.
  
  @param member the member to write receiver annotations for.
  @param rcvrType the receiver type.
  @param descList list of annotation description.
  @param tree the content tree to which the information will be added.