https://openjdk.java.net/ 
public interface com.sun.jdi.connect.AttachingConnector extends com.sun.jdi.connect.Connector
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.jdi.connect.AttachingConnector
  super_class: java.lang.Object
{
  public abstract com.sun.jdi.VirtualMachine attach(java.util.Map<java.lang.String, ? extends com.sun.jdi.connect.Connector$Argument>);
    descriptor: (Ljava/util/Map;)Lcom/sun/jdi/VirtualMachine;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.io.IOException, com.sun.jdi.connect.IllegalConnectorArgumentsException
    Signature: (Ljava/util/Map<Ljava/lang/String;+Lcom/sun/jdi/connect/Connector$Argument;>;)Lcom/sun/jdi/VirtualMachine;
    MethodParameters:
           Name  Flags
      arguments  
}
SourceFile: "AttachingConnector.java"
InnerClasses:
  public abstract Argument = com.sun.jdi.connect.Connector$Argument of com.sun.jdi.connect.Connector