https://developers.google.com/protocol-buffers/protobuf-java/: Core Protocol Buffers library. Protocol Buffers are a way of encoding structured data in an efficient yet extensible format. 
interface com.google.protobuf.PrimitiveNonBoxingCollection
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.google.protobuf.PrimitiveNonBoxingCollection
  super_class: java.lang.Object
{
}
SourceFile: "PrimitiveNonBoxingCollection.java"