http://netty.io/netty-all/: Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients. (The Netty Project) 
public class io.netty.handler.codec.UnsupportedMessageTypeException extends io.netty.handler.codec.CodecException
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.netty.handler.codec.UnsupportedMessageTypeException
  super_class: io.netty.handler.codec.CodecException
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 2799598826487038726

  public void <init>(, java.lang.Class<?>[]);
    descriptor: (Ljava/lang/Object;[Ljava/lang/Class;)V
    flags: (0x0081) ACC_PUBLIC, ACC_VARARGS
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // io.netty.handler.codec.UnsupportedMessageTypeException this
        start local 1 // java.lang.Object message
        start local 2 // java.lang.Class[] expectedTypes
         0: .line 27
            aload 0 /* this */
         1: .line 28
            aload 1 /* message */
            ifnonnull 2
            ldc "null"
            goto 3
      StackMap locals:
      StackMap stack: uninitialized-this
         2: aload 1 /* message */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
      StackMap locals: uninitialized-this java.lang.Object java.lang.Class[]
      StackMap stack: uninitialized-this java.lang.String
         3: aload 2 /* expectedTypes */
         4: .line 27
            invokestatic io.netty.handler.codec.UnsupportedMessageTypeException.message:(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/String;
            invokespecial io.netty.handler.codec.CodecException.<init>:(Ljava/lang/String;)V
         5: .line 29
            return
        end local 2 // java.lang.Class[] expectedTypes
        end local 1 // java.lang.Object message
        end local 0 // io.netty.handler.codec.UnsupportedMessageTypeException this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    6     0           this  Lio/netty/handler/codec/UnsupportedMessageTypeException;
            0    6     1        message  Ljava/lang/Object;
            0    6     2  expectedTypes  [Ljava/lang/Class;
    Signature: (Ljava/lang/Object;[Ljava/lang/Class<*>;)V
    MethodParameters:
               Name  Flags
      message        
      expectedTypes  

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.UnsupportedMessageTypeException this
         0: .line 31
            aload 0 /* this */
            invokespecial io.netty.handler.codec.CodecException.<init>:()V
            return
        end local 0 // io.netty.handler.codec.UnsupportedMessageTypeException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/UnsupportedMessageTypeException;

  public void <init>(java.lang.String, java.lang.Throwable);
    descriptor: (Ljava/lang/String;Ljava/lang/Throwable;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // io.netty.handler.codec.UnsupportedMessageTypeException this
        start local 1 // java.lang.String message
        start local 2 // java.lang.Throwable cause
         0: .line 34
            aload 0 /* this */
            aload 1 /* message */
            aload 2 /* cause */
            invokespecial io.netty.handler.codec.CodecException.<init>:(Ljava/lang/String;Ljava/lang/Throwable;)V
         1: .line 35
            return
        end local 2 // java.lang.Throwable cause
        end local 1 // java.lang.String message
        end local 0 // io.netty.handler.codec.UnsupportedMessageTypeException this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    2     0     this  Lio/netty/handler/codec/UnsupportedMessageTypeException;
            0    2     1  message  Ljava/lang/String;
            0    2     2    cause  Ljava/lang/Throwable;
    MethodParameters:
         Name  Flags
      message  
      cause    

  public void <init>(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.UnsupportedMessageTypeException this
        start local 1 // java.lang.String s
         0: .line 38
            aload 0 /* this */
            aload 1 /* s */
            invokespecial io.netty.handler.codec.CodecException.<init>:(Ljava/lang/String;)V
         1: .line 39
            return
        end local 1 // java.lang.String s
        end local 0 // io.netty.handler.codec.UnsupportedMessageTypeException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/handler/codec/UnsupportedMessageTypeException;
            0    2     1     s  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      s     

  public void <init>(java.lang.Throwable);
    descriptor: (Ljava/lang/Throwable;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.UnsupportedMessageTypeException this
        start local 1 // java.lang.Throwable cause
         0: .line 42
            aload 0 /* this */
            aload 1 /* cause */
            invokespecial io.netty.handler.codec.CodecException.<init>:(Ljava/lang/Throwable;)V
         1: .line 43
            return
        end local 1 // java.lang.Throwable cause
        end local 0 // io.netty.handler.codec.UnsupportedMessageTypeException this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lio/netty/handler/codec/UnsupportedMessageTypeException;
            0    2     1  cause  Ljava/lang/Throwable;
    MethodParameters:
       Name  Flags
      cause  

  private static java.lang.String message(java.lang.String, java.lang.Class<?>[]);
    descriptor: (Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/String;
    flags: (0x008a) ACC_PRIVATE, ACC_STATIC, ACC_VARARGS
    Code:
      stack=3, locals=5, args_size=2
        start local 0 // java.lang.String actualType
        start local 1 // java.lang.Class[] expectedTypes
         0: .line 47
            new java.lang.StringBuilder
            dup
            aload 0 /* actualType */
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            astore 2 /* buf */
        start local 2 // java.lang.StringBuilder buf
         1: .line 49
            aload 1 /* expectedTypes */
            ifnull 12
            aload 1 /* expectedTypes */
            arraylength
            ifle 12
         2: .line 50
            aload 2 /* buf */
            ldc " (expected: "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 1 /* expectedTypes */
            iconst_0
            aaload
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         3: .line 51
            iconst_1
            istore 3 /* i */
        start local 3 // int i
         4: goto 10
         5: .line 52
      StackMap locals: java.lang.StringBuilder int
      StackMap stack:
            aload 1 /* expectedTypes */
            iload 3 /* i */
            aaload
            astore 4 /* t */
        start local 4 // java.lang.Class t
         6: .line 53
            aload 4 /* t */
            ifnonnull 8
         7: .line 54
            goto 11
         8: .line 56
      StackMap locals: java.lang.Class
      StackMap stack:
            aload 2 /* buf */
            ldc ", "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 4 /* t */
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
        end local 4 // java.lang.Class t
         9: .line 51
            iinc 3 /* i */ 1
      StackMap locals:
      StackMap stack:
        10: iload 3 /* i */
            aload 1 /* expectedTypes */
            arraylength
            if_icmplt 5
        end local 3 // int i
        11: .line 58
      StackMap locals:
      StackMap stack:
            aload 2 /* buf */
            bipush 41
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            pop
        12: .line 61
      StackMap locals:
      StackMap stack:
            aload 2 /* buf */
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 2 // java.lang.StringBuilder buf
        end local 1 // java.lang.Class[] expectedTypes
        end local 0 // java.lang.String actualType
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   13     0     actualType  Ljava/lang/String;
            0   13     1  expectedTypes  [Ljava/lang/Class;
            1   13     2            buf  Ljava/lang/StringBuilder;
            4   11     3              i  I
            6    9     4              t  Ljava/lang/Class<*>;
    Signature: (Ljava/lang/String;[Ljava/lang/Class<*>;)Ljava/lang/String;
    MethodParameters:
               Name  Flags
      actualType     
      expectedTypes  
}
SourceFile: "UnsupportedMessageTypeException.java"