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