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) 
final class io.netty.handler.codec.compression.ZlibUtil
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: io.netty.handler.codec.compression.ZlibUtil
  super_class: java.lang.Object
{
  private static volatile int[] $SWITCH_TABLE$io$netty$handler$codec$compression$ZlibWrapper;
    descriptor: [I
    flags: (0x104a) ACC_PRIVATE, ACC_STATIC, ACC_VOLATILE, ACC_SYNTHETIC

  static void fail(com.jcraft.jzlib.Inflater, java.lang.String, int);
    descriptor: (Lcom/jcraft/jzlib/Inflater;Ljava/lang/String;I)V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.jcraft.jzlib.Inflater z
        start local 1 // java.lang.String message
        start local 2 // int resultCode
         0: .line 28
            aload 0 /* z */
            aload 1 /* message */
            iload 2 /* resultCode */
            invokestatic io.netty.handler.codec.compression.ZlibUtil.inflaterException:(Lcom/jcraft/jzlib/Inflater;Ljava/lang/String;I)Lio/netty/handler/codec/compression/DecompressionException;
            athrow
        end local 2 // int resultCode
        end local 1 // java.lang.String message
        end local 0 // com.jcraft.jzlib.Inflater z
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    1     0           z  Lcom/jcraft/jzlib/Inflater;
            0    1     1     message  Ljava/lang/String;
            0    1     2  resultCode  I
    MethodParameters:
            Name  Flags
      z           
      message     
      resultCode  

  static void fail(com.jcraft.jzlib.Deflater, java.lang.String, int);
    descriptor: (Lcom/jcraft/jzlib/Deflater;Ljava/lang/String;I)V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.jcraft.jzlib.Deflater z
        start local 1 // java.lang.String message
        start local 2 // int resultCode
         0: .line 32
            aload 0 /* z */
            aload 1 /* message */
            iload 2 /* resultCode */
            invokestatic io.netty.handler.codec.compression.ZlibUtil.deflaterException:(Lcom/jcraft/jzlib/Deflater;Ljava/lang/String;I)Lio/netty/handler/codec/compression/CompressionException;
            athrow
        end local 2 // int resultCode
        end local 1 // java.lang.String message
        end local 0 // com.jcraft.jzlib.Deflater z
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    1     0           z  Lcom/jcraft/jzlib/Deflater;
            0    1     1     message  Ljava/lang/String;
            0    1     2  resultCode  I
    MethodParameters:
            Name  Flags
      z           
      message     
      resultCode  

  static io.netty.handler.codec.compression.DecompressionException inflaterException(com.jcraft.jzlib.Inflater, java.lang.String, int);
    descriptor: (Lcom/jcraft/jzlib/Inflater;Ljava/lang/String;I)Lio/netty/handler/codec/compression/DecompressionException;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=6, locals=3, args_size=3
        start local 0 // com.jcraft.jzlib.Inflater z
        start local 1 // java.lang.String message
        start local 2 // int resultCode
         0: .line 36
            new io.netty.handler.codec.compression.DecompressionException
            dup
            new java.lang.StringBuilder
            dup
            aload 1 /* message */
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc " ("
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            iload 2 /* resultCode */
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            bipush 41
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            aload 0 /* z */
            getfield com.jcraft.jzlib.Inflater.msg:Ljava/lang/String;
            ifnull 1
            new java.lang.StringBuilder
            dup
            ldc ": "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* z */
            getfield com.jcraft.jzlib.Inflater.msg:Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            goto 2
      StackMap locals: com.jcraft.jzlib.Inflater java.lang.String int
      StackMap stack: new 0 new 0 java.lang.StringBuilder
         1: ldc ""
      StackMap locals: com.jcraft.jzlib.Inflater java.lang.String int
      StackMap stack: new 0 new 0 java.lang.StringBuilder java.lang.String
         2: invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial io.netty.handler.codec.compression.DecompressionException.<init>:(Ljava/lang/String;)V
            areturn
        end local 2 // int resultCode
        end local 1 // java.lang.String message
        end local 0 // com.jcraft.jzlib.Inflater z
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    3     0           z  Lcom/jcraft/jzlib/Inflater;
            0    3     1     message  Ljava/lang/String;
            0    3     2  resultCode  I
    MethodParameters:
            Name  Flags
      z           
      message     
      resultCode  

  static io.netty.handler.codec.compression.CompressionException deflaterException(com.jcraft.jzlib.Deflater, java.lang.String, int);
    descriptor: (Lcom/jcraft/jzlib/Deflater;Ljava/lang/String;I)Lio/netty/handler/codec/compression/CompressionException;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=6, locals=3, args_size=3
        start local 0 // com.jcraft.jzlib.Deflater z
        start local 1 // java.lang.String message
        start local 2 // int resultCode
         0: .line 40
            new io.netty.handler.codec.compression.CompressionException
            dup
            new java.lang.StringBuilder
            dup
            aload 1 /* message */
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc " ("
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            iload 2 /* resultCode */
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            bipush 41
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            aload 0 /* z */
            getfield com.jcraft.jzlib.Deflater.msg:Ljava/lang/String;
            ifnull 1
            new java.lang.StringBuilder
            dup
            ldc ": "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* z */
            getfield com.jcraft.jzlib.Deflater.msg:Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            goto 2
      StackMap locals: com.jcraft.jzlib.Deflater java.lang.String int
      StackMap stack: new 0 new 0 java.lang.StringBuilder
         1: ldc ""
      StackMap locals: com.jcraft.jzlib.Deflater java.lang.String int
      StackMap stack: new 0 new 0 java.lang.StringBuilder java.lang.String
         2: invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial io.netty.handler.codec.compression.CompressionException.<init>:(Ljava/lang/String;)V
            areturn
        end local 2 // int resultCode
        end local 1 // java.lang.String message
        end local 0 // com.jcraft.jzlib.Deflater z
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    3     0           z  Lcom/jcraft/jzlib/Deflater;
            0    3     1     message  Ljava/lang/String;
            0    3     2  resultCode  I
    MethodParameters:
            Name  Flags
      z           
      message     
      resultCode  

  static com.jcraft.jzlib.JZlib$WrapperType convertWrapperType(io.netty.handler.codec.compression.ZlibWrapper);
    descriptor: (Lio/netty/handler/codec/compression/ZlibWrapper;)Lcom/jcraft/jzlib/JZlib$WrapperType;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // io.netty.handler.codec.compression.ZlibWrapper wrapper
         0: .line 45
            invokestatic io.netty.handler.codec.compression.ZlibUtil.$SWITCH_TABLE$io$netty$handler$codec$compression$ZlibWrapper:()[I
            aload 0 /* wrapper */
            invokevirtual io.netty.handler.codec.compression.ZlibWrapper.ordinal:()I
            iaload
            tableswitch { // 1 - 4
                    1: 3
                    2: 5
                    3: 1
                    4: 7
              default: 9
          }
         1: .line 47
      StackMap locals:
      StackMap stack:
            getstatic com.jcraft.jzlib.JZlib.W_NONE:Lcom/jcraft/jzlib/JZlib$WrapperType;
            astore 1 /* convertedWrapperType */
        start local 1 // com.jcraft.jzlib.JZlib$WrapperType convertedWrapperType
         2: .line 48
            goto 10
        end local 1 // com.jcraft.jzlib.JZlib$WrapperType convertedWrapperType
         3: .line 50
      StackMap locals:
      StackMap stack:
            getstatic com.jcraft.jzlib.JZlib.W_ZLIB:Lcom/jcraft/jzlib/JZlib$WrapperType;
            astore 1 /* convertedWrapperType */
        start local 1 // com.jcraft.jzlib.JZlib$WrapperType convertedWrapperType
         4: .line 51
            goto 10
        end local 1 // com.jcraft.jzlib.JZlib$WrapperType convertedWrapperType
         5: .line 53
      StackMap locals:
      StackMap stack:
            getstatic com.jcraft.jzlib.JZlib.W_GZIP:Lcom/jcraft/jzlib/JZlib$WrapperType;
            astore 1 /* convertedWrapperType */
        start local 1 // com.jcraft.jzlib.JZlib$WrapperType convertedWrapperType
         6: .line 54
            goto 10
        end local 1 // com.jcraft.jzlib.JZlib$WrapperType convertedWrapperType
         7: .line 56
      StackMap locals:
      StackMap stack:
            getstatic com.jcraft.jzlib.JZlib.W_ANY:Lcom/jcraft/jzlib/JZlib$WrapperType;
            astore 1 /* convertedWrapperType */
        start local 1 // com.jcraft.jzlib.JZlib$WrapperType convertedWrapperType
         8: .line 57
            goto 10
        end local 1 // com.jcraft.jzlib.JZlib$WrapperType convertedWrapperType
         9: .line 59
      StackMap locals:
      StackMap stack:
            new java.lang.Error
            dup
            invokespecial java.lang.Error.<init>:()V
            athrow
        start local 1 // com.jcraft.jzlib.JZlib$WrapperType convertedWrapperType
        10: .line 61
      StackMap locals: com.jcraft.jzlib.JZlib$WrapperType
      StackMap stack:
            aload 1 /* convertedWrapperType */
            areturn
        end local 1 // com.jcraft.jzlib.JZlib$WrapperType convertedWrapperType
        end local 0 // io.netty.handler.codec.compression.ZlibWrapper wrapper
      LocalVariableTable:
        Start  End  Slot                  Name  Signature
            0   11     0               wrapper  Lio/netty/handler/codec/compression/ZlibWrapper;
            2    3     1  convertedWrapperType  Lcom/jcraft/jzlib/JZlib$WrapperType;
            4    5     1  convertedWrapperType  Lcom/jcraft/jzlib/JZlib$WrapperType;
            6    7     1  convertedWrapperType  Lcom/jcraft/jzlib/JZlib$WrapperType;
            8    9     1  convertedWrapperType  Lcom/jcraft/jzlib/JZlib$WrapperType;
           10   11     1  convertedWrapperType  Lcom/jcraft/jzlib/JZlib$WrapperType;
    MethodParameters:
         Name  Flags
      wrapper  

  static int wrapperOverhead(io.netty.handler.codec.compression.ZlibWrapper);
    descriptor: (Lio/netty/handler/codec/compression/ZlibWrapper;)I
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // io.netty.handler.codec.compression.ZlibWrapper wrapper
         0: .line 66
            invokestatic io.netty.handler.codec.compression.ZlibUtil.$SWITCH_TABLE$io$netty$handler$codec$compression$ZlibWrapper:()[I
            aload 0 /* wrapper */
            invokevirtual io.netty.handler.codec.compression.ZlibWrapper.ordinal:()I
            iaload
            tableswitch { // 1 - 4
                    1: 3
                    2: 5
                    3: 1
                    4: 3
              default: 7
          }
         1: .line 68
      StackMap locals:
      StackMap stack:
            iconst_0
            istore 1 /* overhead */
        start local 1 // int overhead
         2: .line 69
            goto 8
        end local 1 // int overhead
         3: .line 72
      StackMap locals:
      StackMap stack:
            iconst_2
            istore 1 /* overhead */
        start local 1 // int overhead
         4: .line 73
            goto 8
        end local 1 // int overhead
         5: .line 75
      StackMap locals:
      StackMap stack:
            bipush 10
            istore 1 /* overhead */
        start local 1 // int overhead
         6: .line 76
            goto 8
        end local 1 // int overhead
         7: .line 78
      StackMap locals:
      StackMap stack:
            new java.lang.Error
            dup
            invokespecial java.lang.Error.<init>:()V
            athrow
        start local 1 // int overhead
         8: .line 80
      StackMap locals: int
      StackMap stack:
            iload 1 /* overhead */
            ireturn
        end local 1 // int overhead
        end local 0 // io.netty.handler.codec.compression.ZlibWrapper wrapper
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    9     0   wrapper  Lio/netty/handler/codec/compression/ZlibWrapper;
            2    3     1  overhead  I
            4    5     1  overhead  I
            6    7     1  overhead  I
            8    9     1  overhead  I
    MethodParameters:
         Name  Flags
      wrapper  

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.compression.ZlibUtil this
         0: .line 83
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 84
            return
        end local 0 // io.netty.handler.codec.compression.ZlibUtil this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/handler/codec/compression/ZlibUtil;

  static int[] $SWITCH_TABLE$io$netty$handler$codec$compression$ZlibWrapper();
    descriptor: ()[I
    flags: (0x1008) ACC_STATIC, ACC_SYNTHETIC
    Code:
      stack=3, locals=1, args_size=0
         0: .line 25
            getstatic io.netty.handler.codec.compression.ZlibUtil.$SWITCH_TABLE$io$netty$handler$codec$compression$ZlibWrapper:[I
            dup
            ifnull 1
            areturn
      StackMap locals:
      StackMap stack: int[]
         1: pop
            invokestatic io.netty.handler.codec.compression.ZlibWrapper.values:()[Lio/netty/handler/codec/compression/ZlibWrapper;
            arraylength
            newarray 10
            astore 0
         2: aload 0
            getstatic io.netty.handler.codec.compression.ZlibWrapper.GZIP:Lio/netty/handler/codec/compression/ZlibWrapper;
            invokevirtual io.netty.handler.codec.compression.ZlibWrapper.ordinal:()I
            iconst_2
            iastore
         3: goto 5
      StackMap locals: int[]
      StackMap stack: java.lang.NoSuchFieldError
         4: pop
      StackMap locals:
      StackMap stack:
         5: aload 0
            getstatic io.netty.handler.codec.compression.ZlibWrapper.NONE:Lio/netty/handler/codec/compression/ZlibWrapper;
            invokevirtual io.netty.handler.codec.compression.ZlibWrapper.ordinal:()I
            iconst_3
            iastore
         6: goto 8
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
         7: pop
      StackMap locals:
      StackMap stack:
         8: aload 0
            getstatic io.netty.handler.codec.compression.ZlibWrapper.ZLIB:Lio/netty/handler/codec/compression/ZlibWrapper;
            invokevirtual io.netty.handler.codec.compression.ZlibWrapper.ordinal:()I
            iconst_1
            iastore
         9: goto 11
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
        10: pop
      StackMap locals:
      StackMap stack:
        11: aload 0
            getstatic io.netty.handler.codec.compression.ZlibWrapper.ZLIB_OR_NONE:Lio/netty/handler/codec/compression/ZlibWrapper;
            invokevirtual io.netty.handler.codec.compression.ZlibWrapper.ordinal:()I
            iconst_4
            iastore
        12: goto 14
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
        13: pop
      StackMap locals:
      StackMap stack:
        14: aload 0
            dup
            putstatic io.netty.handler.codec.compression.ZlibUtil.$SWITCH_TABLE$io$netty$handler$codec$compression$ZlibWrapper:[I
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
      Exception table:
        from    to  target  type
           2     3       4  Class java.lang.NoSuchFieldError
           5     6       7  Class java.lang.NoSuchFieldError
           8     9      10  Class java.lang.NoSuchFieldError
          11    12      13  Class java.lang.NoSuchFieldError
}
SourceFile: "ZlibUtil.java"
InnerClasses:
  public final WrapperType = com.jcraft.jzlib.JZlib$WrapperType of com.jcraft.jzlib.JZlib