https://www.graalvm.org/ 
class com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy implements org.graalvm.polyglot.io.MessageEndpoint
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy
  super_class: java.lang.Object
{
  private final org.graalvm.polyglot.io.MessageEndpoint endpoint;
    descriptor: Lorg/graalvm/polyglot/io/MessageEndpoint;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  void <init>(org.graalvm.polyglot.io.MessageEndpoint);
    descriptor: (Lorg/graalvm/polyglot/io/MessageEndpoint;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy this
        start local 1 // org.graalvm.polyglot.io.MessageEndpoint endpoint
         0: .line 1286
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 1287
            aload 0 /* this */
            aload 1 /* endpoint */
            putfield com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy.endpoint:Lorg/graalvm/polyglot/io/MessageEndpoint;
         2: .line 1288
            return
        end local 1 // org.graalvm.polyglot.io.MessageEndpoint endpoint
        end local 0 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lcom/oracle/truffle/api/instrumentation/TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy;
            0    3     1  endpoint  Lorg/graalvm/polyglot/io/MessageEndpoint;
    MethodParameters:
          Name  Flags
      endpoint  

  public void sendText(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy this
        start local 1 // java.lang.String text
         0: .line 1292
            aload 0 /* this */
            getfield com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy.endpoint:Lorg/graalvm/polyglot/io/MessageEndpoint;
            aload 1 /* text */
            invokeinterface org.graalvm.polyglot.io.MessageEndpoint.sendText:(Ljava/lang/String;)V
         1: .line 1293
            return
        end local 1 // java.lang.String text
        end local 0 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/api/instrumentation/TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy;
            0    2     1  text  Ljava/lang/String;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      text  

  public void sendBinary(java.nio.ByteBuffer);
    descriptor: (Ljava/nio/ByteBuffer;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy this
        start local 1 // java.nio.ByteBuffer data
         0: .line 1297
            aload 0 /* this */
            getfield com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy.endpoint:Lorg/graalvm/polyglot/io/MessageEndpoint;
            aload 1 /* data */
            invokeinterface org.graalvm.polyglot.io.MessageEndpoint.sendBinary:(Ljava/nio/ByteBuffer;)V
         1: .line 1298
            return
        end local 1 // java.nio.ByteBuffer data
        end local 0 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/api/instrumentation/TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy;
            0    2     1  data  Ljava/nio/ByteBuffer;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      data  

  public void sendPing(java.nio.ByteBuffer);
    descriptor: (Ljava/nio/ByteBuffer;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy this
        start local 1 // java.nio.ByteBuffer data
         0: .line 1302
            aload 0 /* this */
            getfield com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy.endpoint:Lorg/graalvm/polyglot/io/MessageEndpoint;
            aload 1 /* data */
            invokeinterface org.graalvm.polyglot.io.MessageEndpoint.sendPing:(Ljava/nio/ByteBuffer;)V
         1: .line 1303
            return
        end local 1 // java.nio.ByteBuffer data
        end local 0 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/api/instrumentation/TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy;
            0    2     1  data  Ljava/nio/ByteBuffer;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      data  

  public void sendPong(java.nio.ByteBuffer);
    descriptor: (Ljava/nio/ByteBuffer;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy this
        start local 1 // java.nio.ByteBuffer data
         0: .line 1307
            aload 0 /* this */
            getfield com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy.endpoint:Lorg/graalvm/polyglot/io/MessageEndpoint;
            aload 1 /* data */
            invokeinterface org.graalvm.polyglot.io.MessageEndpoint.sendPong:(Ljava/nio/ByteBuffer;)V
         1: .line 1308
            return
        end local 1 // java.nio.ByteBuffer data
        end local 0 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/api/instrumentation/TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy;
            0    2     1  data  Ljava/nio/ByteBuffer;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      data  

  public void sendClose();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy this
         0: .line 1312
            aload 0 /* this */
            getfield com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy.endpoint:Lorg/graalvm/polyglot/io/MessageEndpoint;
            invokeinterface org.graalvm.polyglot.io.MessageEndpoint.sendClose:()V
         1: .line 1313
            return
        end local 0 // com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/api/instrumentation/TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy;
    Exceptions:
      throws java.io.IOException
}
SourceFile: "TruffleInstrument.java"
NestHost: com.oracle.truffle.api.instrumentation.TruffleInstrument
InnerClasses:
  public final Env = com.oracle.truffle.api.instrumentation.TruffleInstrument$Env of com.oracle.truffle.api.instrumentation.TruffleInstrument
  private MessageTransportProxy = com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy of com.oracle.truffle.api.instrumentation.TruffleInstrument$Env
  private MessageEndpointProxy = com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy of com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy