http://nexus.sonatype.org/oss-repository-hosting.html/vertx-parent/vertx-ext/vertx-ext-parent/vertx-web-parent/vertx-web: Sonatype helps open source projects to set up Maven repositories on https://oss.sonatype.org/ (Eclipse) 
class examples.WebExamples$Book
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: examples.WebExamples$Book
  super_class: java.lang.Object
{
  final examples.WebExamples this$0;
    descriptor: Lexamples/WebExamples;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(examples.WebExamples);
    descriptor: (Lexamples/WebExamples;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // examples.WebExamples$Book this
         0: .line 1333
            aload 0 /* this */
            aload 1
            putfield examples.WebExamples$Book.this$0:Lexamples/WebExamples;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // examples.WebExamples$Book this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lexamples/WebExamples$Book;
    MethodParameters:
        Name  Flags
      this$0  final
}
SourceFile: "WebExamples.java"
NestHost: examples.WebExamples
InnerClasses:
  Book = examples.WebExamples$Book of examples.WebExamples