https://www.graalvm.org/ 
class com.oracle.truffle.polyglot.InstrumentCache$1 implements java.util.Comparator<com.oracle.truffle.polyglot.InstrumentCache>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.polyglot.InstrumentCache$1
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.polyglot.InstrumentCache$1 this
         0: .line 146
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.polyglot.InstrumentCache$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/polyglot/InstrumentCache$1;

  public int compare(com.oracle.truffle.polyglot.InstrumentCache, com.oracle.truffle.polyglot.InstrumentCache);
    descriptor: (Lcom/oracle/truffle/polyglot/InstrumentCache;Lcom/oracle/truffle/polyglot/InstrumentCache;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.oracle.truffle.polyglot.InstrumentCache$1 this
        start local 1 // com.oracle.truffle.polyglot.InstrumentCache o1
        start local 2 // com.oracle.truffle.polyglot.InstrumentCache o2
         0: .line 149
            aload 1 /* o1 */
            invokevirtual com.oracle.truffle.polyglot.InstrumentCache.getId:()Ljava/lang/String;
            aload 2 /* o2 */
            invokevirtual com.oracle.truffle.polyglot.InstrumentCache.getId:()Ljava/lang/String;
            invokevirtual java.lang.String.compareTo:(Ljava/lang/String;)I
            ireturn
        end local 2 // com.oracle.truffle.polyglot.InstrumentCache o2
        end local 1 // com.oracle.truffle.polyglot.InstrumentCache o1
        end local 0 // com.oracle.truffle.polyglot.InstrumentCache$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/polyglot/InstrumentCache$1;
            0    1     1    o1  Lcom/oracle/truffle/polyglot/InstrumentCache;
            0    1     2    o2  Lcom/oracle/truffle/polyglot/InstrumentCache;
    MethodParameters:
      Name  Flags
      o1    
      o2    

  public int compare(java.lang.Object, java.lang.Object);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)I
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
         0: .line 1
            aload 0
            aload 1
            checkcast com.oracle.truffle.polyglot.InstrumentCache
            aload 2
            checkcast com.oracle.truffle.polyglot.InstrumentCache
            invokevirtual com.oracle.truffle.polyglot.InstrumentCache$1.compare:(Lcom/oracle/truffle/polyglot/InstrumentCache;Lcom/oracle/truffle/polyglot/InstrumentCache;)I
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/Comparator<Lcom/oracle/truffle/polyglot/InstrumentCache;>;
SourceFile: "InstrumentCache.java"
EnclosingMethod: com.oracle.truffle.polyglot.InstrumentCache.doLoad:(Ljava/util/List;)Ljava/util/List;
NestHost: com.oracle.truffle.polyglot.InstrumentCache
InnerClasses:
  abstract AbstractClassLoaderSupplier = com.oracle.truffle.polyglot.EngineAccessor$AbstractClassLoaderSupplier of com.oracle.truffle.polyglot.EngineAccessor
  com.oracle.truffle.polyglot.InstrumentCache$1