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 final class io.netty.handler.codec.dns.DefaultDnsOptEcsRecord extends io.netty.handler.codec.dns.AbstractDnsOptPseudoRrRecord implements io.netty.handler.codec.dns.DnsOptEcsRecord
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: io.netty.handler.codec.dns.DefaultDnsOptEcsRecord
  super_class: io.netty.handler.codec.dns.AbstractDnsOptPseudoRrRecord
{
  private final int srcPrefixLength;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final byte[] address;
    descriptor: [B
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>(int, int, int, int, byte[]);
    descriptor: (IIII[B)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=6, args_size=6
        start local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
        start local 1 // int maxPayloadSize
        start local 2 // int extendedRcode
        start local 3 // int version
        start local 4 // int srcPrefixLength
        start local 5 // byte[] address
         0: .line 43
            aload 0 /* this */
            iload 1 /* maxPayloadSize */
            iload 2 /* extendedRcode */
            iload 3 /* version */
            invokespecial io.netty.handler.codec.dns.AbstractDnsOptPseudoRrRecord.<init>:(III)V
         1: .line 44
            aload 0 /* this */
            iload 4 /* srcPrefixLength */
            putfield io.netty.handler.codec.dns.DefaultDnsOptEcsRecord.srcPrefixLength:I
         2: .line 45
            aload 0 /* this */
            aload 5 /* address */
            invokestatic io.netty.handler.codec.dns.DefaultDnsOptEcsRecord.verifyAddress:([B)[B
            invokevirtual byte[].clone:()Ljava/lang/Object;
            checkcast byte[]
            putfield io.netty.handler.codec.dns.DefaultDnsOptEcsRecord.address:[B
         3: .line 46
            return
        end local 5 // byte[] address
        end local 4 // int srcPrefixLength
        end local 3 // int version
        end local 2 // int extendedRcode
        end local 1 // int maxPayloadSize
        end local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    4     0             this  Lio/netty/handler/codec/dns/DefaultDnsOptEcsRecord;
            0    4     1   maxPayloadSize  I
            0    4     2    extendedRcode  I
            0    4     3          version  I
            0    4     4  srcPrefixLength  I
            0    4     5          address  [B
    MethodParameters:
                 Name  Flags
      maxPayloadSize   
      extendedRcode    
      version          
      srcPrefixLength  
      address          

  public void <init>(int, int, byte[]);
    descriptor: (II[B)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=4, args_size=4
        start local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
        start local 1 // int maxPayloadSize
        start local 2 // int srcPrefixLength
        start local 3 // byte[] address
         0: .line 56
            aload 0 /* this */
            iload 1 /* maxPayloadSize */
            iconst_0
            iconst_0
            iload 2 /* srcPrefixLength */
            aload 3 /* address */
            invokespecial io.netty.handler.codec.dns.DefaultDnsOptEcsRecord.<init>:(IIII[B)V
         1: .line 57
            return
        end local 3 // byte[] address
        end local 2 // int srcPrefixLength
        end local 1 // int maxPayloadSize
        end local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    2     0             this  Lio/netty/handler/codec/dns/DefaultDnsOptEcsRecord;
            0    2     1   maxPayloadSize  I
            0    2     2  srcPrefixLength  I
            0    2     3          address  [B
    MethodParameters:
                 Name  Flags
      maxPayloadSize   
      srcPrefixLength  
      address          

  public void <init>(int, io.netty.channel.socket.InternetProtocolFamily);
    descriptor: (ILio/netty/channel/socket/InternetProtocolFamily;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=3, args_size=3
        start local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
        start local 1 // int maxPayloadSize
        start local 2 // io.netty.channel.socket.InternetProtocolFamily protocolFamily
         0: .line 67
            aload 0 /* this */
            iload 1 /* maxPayloadSize */
            iconst_0
            iconst_0
            iconst_0
            aload 2 /* protocolFamily */
            invokevirtual io.netty.channel.socket.InternetProtocolFamily.localhost:()Ljava/net/InetAddress;
            invokevirtual java.net.InetAddress.getAddress:()[B
            invokespecial io.netty.handler.codec.dns.DefaultDnsOptEcsRecord.<init>:(IIII[B)V
         1: .line 68
            return
        end local 2 // io.netty.channel.socket.InternetProtocolFamily protocolFamily
        end local 1 // int maxPayloadSize
        end local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    2     0            this  Lio/netty/handler/codec/dns/DefaultDnsOptEcsRecord;
            0    2     1  maxPayloadSize  I
            0    2     2  protocolFamily  Lio/netty/channel/socket/InternetProtocolFamily;
    MethodParameters:
                Name  Flags
      maxPayloadSize  
      protocolFamily  

  private static byte[] verifyAddress(byte[]);
    descriptor: ([B)[B
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // byte[] bytes
         0: .line 71
            aload 0 /* bytes */
            arraylength
            iconst_4
            if_icmpeq 1
            aload 0 /* bytes */
            arraylength
            bipush 16
            if_icmpne 2
         1: .line 72
      StackMap locals:
      StackMap stack:
            aload 0 /* bytes */
            areturn
         2: .line 74
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            ldc "bytes.length must either 4 or 16"
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // byte[] bytes
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0  bytes  [B
    MethodParameters:
       Name  Flags
      bytes  

  public int sourcePrefixLength();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
         0: .line 79
            aload 0 /* this */
            getfield io.netty.handler.codec.dns.DefaultDnsOptEcsRecord.srcPrefixLength:I
            ireturn
        end local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/dns/DefaultDnsOptEcsRecord;

  public int scopePrefixLength();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
         0: .line 84
            iconst_0
            ireturn
        end local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/dns/DefaultDnsOptEcsRecord;

  public byte[] address();
    descriptor: ()[B
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
         0: .line 89
            aload 0 /* this */
            getfield io.netty.handler.codec.dns.DefaultDnsOptEcsRecord.address:[B
            invokevirtual byte[].clone:()Ljava/lang/Object;
            checkcast byte[]
            areturn
        end local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/dns/DefaultDnsOptEcsRecord;

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=1
        start local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
         0: .line 94
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.dns.DefaultDnsOptEcsRecord.toStringBuilder:()Ljava/lang/StringBuilder;
            astore 1 /* sb */
        start local 1 // java.lang.StringBuilder sb
         1: .line 95
            aload 1 /* sb */
            aload 1 /* sb */
            invokevirtual java.lang.StringBuilder.length:()I
            iconst_1
            isub
            invokevirtual java.lang.StringBuilder.setLength:(I)V
         2: .line 96
            aload 1 /* sb */
            ldc " address:"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
         3: .line 97
            aload 0 /* this */
            getfield io.netty.handler.codec.dns.DefaultDnsOptEcsRecord.address:[B
            invokestatic java.util.Arrays.toString:([B)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
         4: .line 98
            ldc " sourcePrefixLength:"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
         5: .line 99
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.dns.DefaultDnsOptEcsRecord.sourcePrefixLength:()I
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
         6: .line 100
            ldc " scopePrefixLength:"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
         7: .line 101
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.dns.DefaultDnsOptEcsRecord.scopePrefixLength:()I
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
         8: .line 102
            bipush 41
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
         9: .line 96
            areturn
        end local 1 // java.lang.StringBuilder sb
        end local 0 // io.netty.handler.codec.dns.DefaultDnsOptEcsRecord this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   10     0  this  Lio/netty/handler/codec/dns/DefaultDnsOptEcsRecord;
            1   10     1    sb  Ljava/lang/StringBuilder;
}
SourceFile: "DefaultDnsOptEcsRecord.java"