https://openjdk.java.net/ 
public interface com.sun.org.apache.bcel.internal.generic.StackProducer
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.org.apache.bcel.internal.generic.StackProducer
  super_class: java.lang.Object
{
  public abstract int produceStack(com.sun.org.apache.bcel.internal.generic.ConstantPoolGen);
    descriptor: (Lcom/sun/org/apache/bcel/internal/generic/ConstantPoolGen;)I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      cpg   
}
SourceFile: "StackProducer.java"