https://www.graalvm.org/ 
public interface com.oracle.truffle.js.nodes.Truncatable
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.js.nodes.Truncatable
  super_class: java.lang.Object
{
  public abstract void setTruncate();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public static void truncate(com.oracle.truffle.api.nodes.Node);
    descriptor: (Lcom/oracle/truffle/api/nodes/Node;)V
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.nodes.Node node
         0: .line 49
            aload 0 /* node */
            instanceof com.oracle.truffle.js.nodes.Truncatable
            ifeq 2
         1: .line 50
            aload 0 /* node */
            checkcast com.oracle.truffle.js.nodes.Truncatable
            invokeinterface com.oracle.truffle.js.nodes.Truncatable.setTruncate:()V
         2: .line 52
      StackMap locals:
      StackMap stack:
            return
        end local 0 // com.oracle.truffle.api.nodes.Node node
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  node  Lcom/oracle/truffle/api/nodes/Node;
    MethodParameters:
      Name  Flags
      node  
}
SourceFile: "Truncatable.java"