https://openjdk.java.net/ 
public interface java.util.Formattable
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: java.util.Formattable
  super_class: java.lang.Object
{
  public abstract void formatTo(java.util.Formatter, int, int, int);
    descriptor: (Ljava/util/Formatter;III)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
           Name  Flags
      formatter  
      flags      
      width      
      precision  
}
SourceFile: "Formattable.java"