https://openjdk.java.net/ 
public interface sun.awt.Graphics2Delegate
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.awt.Graphics2Delegate
  super_class: java.lang.Object
{
  public abstract void setBackground(java.awt.Color);
    descriptor: (Ljava/awt/Color;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      color  
}
SourceFile: "Graphics2Delegate.java"