https://openjdk.java.net/ 
public interface sun.java2d.FontSupport
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.java2d.FontSupport
  super_class: java.lang.Object
{
  public abstract sun.awt.FontConfiguration getFontConfiguration();
    descriptor: ()Lsun/awt/FontConfiguration;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "FontSupport.java"