https://openjdk.java.net/ 
public interface java.rmi.server.RMIServerSocketFactory
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: java.rmi.server.RMIServerSocketFactory
  super_class: java.lang.Object
{
  public abstract java.net.ServerSocket createServerSocket(int);
    descriptor: (I)Ljava/net/ServerSocket;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      port  
}
SourceFile: "RMIServerSocketFactory.java"