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.util.ByteProcessor$IndexOfProcessor implements io.netty.util.ByteProcessor
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.netty.util.ByteProcessor$IndexOfProcessor
  super_class: java.lang.Object
{
  private final byte byteToFind;
    descriptor: B
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>(byte);
    descriptor: (B)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.util.ByteProcessor$IndexOfProcessor this
        start local 1 // byte byteToFind
         0: .line 32
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 33
            aload 0 /* this */
            iload 1 /* byteToFind */
            putfield io.netty.util.ByteProcessor$IndexOfProcessor.byteToFind:B
         2: .line 34
            return
        end local 1 // byte byteToFind
        end local 0 // io.netty.util.ByteProcessor$IndexOfProcessor this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    3     0        this  Lio/netty/util/ByteProcessor$IndexOfProcessor;
            0    3     1  byteToFind  B
    MethodParameters:
            Name  Flags
      byteToFind  

  public boolean process(byte);
    descriptor: (B)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.util.ByteProcessor$IndexOfProcessor this
        start local 1 // byte value
         0: .line 38
            iload 1 /* value */
            aload 0 /* this */
            getfield io.netty.util.ByteProcessor$IndexOfProcessor.byteToFind:B
            if_icmpeq 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 1 // byte value
        end local 0 // io.netty.util.ByteProcessor$IndexOfProcessor this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lio/netty/util/ByteProcessor$IndexOfProcessor;
            0    2     1  value  B
    MethodParameters:
       Name  Flags
      value  
}
SourceFile: "ByteProcessor.java"
NestHost: io.netty.util.ByteProcessor
InnerClasses:
  public IndexOfProcessor = io.netty.util.ByteProcessor$IndexOfProcessor of io.netty.util.ByteProcessor