https://www.graalvm.org/ 
final class com.oracle.truffle.api.debug.SteppingStrategy$AlwaysHalt extends com.oracle.truffle.api.debug.SteppingStrategy
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.api.debug.SteppingStrategy$AlwaysHalt
  super_class: com.oracle.truffle.api.debug.SteppingStrategy
{
  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.debug.SteppingStrategy$AlwaysHalt this
         0: .line 198
            aload 0 /* this */
            invokespecial com.oracle.truffle.api.debug.SteppingStrategy.<init>:()V
            return
        end local 0 // com.oracle.truffle.api.debug.SteppingStrategy$AlwaysHalt this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/debug/SteppingStrategy$AlwaysHalt;

  boolean isActive(com.oracle.truffle.api.instrumentation.EventContext, com.oracle.truffle.api.debug.SuspendAnchor);
    descriptor: (Lcom/oracle/truffle/api/instrumentation/EventContext;Lcom/oracle/truffle/api/debug/SuspendAnchor;)Z
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.oracle.truffle.api.debug.SteppingStrategy$AlwaysHalt this
        start local 1 // com.oracle.truffle.api.instrumentation.EventContext context
        start local 2 // com.oracle.truffle.api.debug.SuspendAnchor suspendAnchor
         0: .line 202
            getstatic com.oracle.truffle.api.debug.SuspendAnchor.BEFORE:Lcom/oracle/truffle/api/debug/SuspendAnchor;
            aload 2 /* suspendAnchor */
            if_acmpne 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 2 // com.oracle.truffle.api.debug.SuspendAnchor suspendAnchor
        end local 1 // com.oracle.truffle.api.instrumentation.EventContext context
        end local 0 // com.oracle.truffle.api.debug.SteppingStrategy$AlwaysHalt this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    2     0           this  Lcom/oracle/truffle/api/debug/SteppingStrategy$AlwaysHalt;
            0    2     1        context  Lcom/oracle/truffle/api/instrumentation/EventContext;
            0    2     2  suspendAnchor  Lcom/oracle/truffle/api/debug/SuspendAnchor;
    MethodParameters:
               Name  Flags
      context        
      suspendAnchor  

  boolean step(com.oracle.truffle.api.debug.DebuggerSession, com.oracle.truffle.api.instrumentation.EventContext, com.oracle.truffle.api.debug.SuspendAnchor);
    descriptor: (Lcom/oracle/truffle/api/debug/DebuggerSession;Lcom/oracle/truffle/api/instrumentation/EventContext;Lcom/oracle/truffle/api/debug/SuspendAnchor;)Z
    flags: (0x0000) 
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // com.oracle.truffle.api.debug.SteppingStrategy$AlwaysHalt this
        start local 1 // com.oracle.truffle.api.debug.DebuggerSession steppingSession
        start local 2 // com.oracle.truffle.api.instrumentation.EventContext context
        start local 3 // com.oracle.truffle.api.debug.SuspendAnchor suspendAnchor
         0: .line 207
            getstatic com.oracle.truffle.api.debug.SuspendAnchor.BEFORE:Lcom/oracle/truffle/api/debug/SuspendAnchor;
            aload 3 /* suspendAnchor */
            if_acmpne 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 3 // com.oracle.truffle.api.debug.SuspendAnchor suspendAnchor
        end local 2 // com.oracle.truffle.api.instrumentation.EventContext context
        end local 1 // com.oracle.truffle.api.debug.DebuggerSession steppingSession
        end local 0 // com.oracle.truffle.api.debug.SteppingStrategy$AlwaysHalt this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    2     0             this  Lcom/oracle/truffle/api/debug/SteppingStrategy$AlwaysHalt;
            0    2     1  steppingSession  Lcom/oracle/truffle/api/debug/DebuggerSession;
            0    2     2          context  Lcom/oracle/truffle/api/instrumentation/EventContext;
            0    2     3    suspendAnchor  Lcom/oracle/truffle/api/debug/SuspendAnchor;
    MethodParameters:
                 Name  Flags
      steppingSession  
      context          
      suspendAnchor    

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.debug.SteppingStrategy$AlwaysHalt this
         0: .line 212
            ldc "HALT"
            areturn
        end local 0 // com.oracle.truffle.api.debug.SteppingStrategy$AlwaysHalt this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/debug/SteppingStrategy$AlwaysHalt;
}
SourceFile: "SteppingStrategy.java"
NestHost: com.oracle.truffle.api.debug.SteppingStrategy
InnerClasses:
  private final AlwaysHalt = com.oracle.truffle.api.debug.SteppingStrategy$AlwaysHalt of com.oracle.truffle.api.debug.SteppingStrategy