https://openjdk.java.net/ 
public interface org.graalvm.compiler.phases.schedule.BlockClosure
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.graalvm.compiler.phases.schedule.BlockClosure
  super_class: java.lang.Object
{
  public abstract void apply(org.graalvm.compiler.nodes.cfg.Block);
    descriptor: (Lorg/graalvm/compiler/nodes/cfg/Block;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      block  
}
SourceFile: "BlockClosure.java"