https://openjdk.java.net/ 
interface sun.security.ssl.HandshakeProducer
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.security.ssl.HandshakeProducer
  super_class: java.lang.Object
{
  public abstract byte[] produce(sun.security.ssl.ConnectionContext, sun.security.ssl.SSLHandshake$HandshakeMessage);
    descriptor: (Lsun/security/ssl/ConnectionContext;Lsun/security/ssl/SSLHandshake$HandshakeMessage;)[B
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.io.IOException
    MethodParameters:
         Name  Flags
      context  
      message  
}
SourceFile: "HandshakeProducer.java"
InnerClasses:
  abstract HandshakeMessage = sun.security.ssl.SSLHandshake$HandshakeMessage of sun.security.ssl.SSLHandshake