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.channel.nio.SelectedSelectionKeySet extends java.util.AbstractSet<java.nio.channels.SelectionKey>
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: io.netty.channel.nio.SelectedSelectionKeySet
  super_class: java.util.AbstractSet
{
  java.nio.channels.SelectionKey[] keys;
    descriptor: [Ljava/nio/channels/SelectionKey;
    flags: (0x0000) 

  int size;
    descriptor: I
    flags: (0x0000) 

  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
         0: .line 28
            aload 0 /* this */
            invokespecial java.util.AbstractSet.<init>:()V
         1: .line 29
            aload 0 /* this */
            sipush 1024
            anewarray java.nio.channels.SelectionKey
            putfield io.netty.channel.nio.SelectedSelectionKeySet.keys:[Ljava/nio/channels/SelectionKey;
         2: .line 30
            return
        end local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lio/netty/channel/nio/SelectedSelectionKeySet;

  public boolean add(java.nio.channels.SelectionKey);
    descriptor: (Ljava/nio/channels/SelectionKey;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=2, args_size=2
        start local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
        start local 1 // java.nio.channels.SelectionKey o
         0: .line 34
            aload 1 /* o */
            ifnonnull 2
         1: .line 35
            iconst_0
            ireturn
         2: .line 38
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield io.netty.channel.nio.SelectedSelectionKeySet.keys:[Ljava/nio/channels/SelectionKey;
            aload 0 /* this */
            dup
            getfield io.netty.channel.nio.SelectedSelectionKeySet.size:I
            dup_x1
            iconst_1
            iadd
            putfield io.netty.channel.nio.SelectedSelectionKeySet.size:I
            aload 1 /* o */
            aastore
         3: .line 39
            aload 0 /* this */
            getfield io.netty.channel.nio.SelectedSelectionKeySet.size:I
            aload 0 /* this */
            getfield io.netty.channel.nio.SelectedSelectionKeySet.keys:[Ljava/nio/channels/SelectionKey;
            arraylength
            if_icmpne 5
         4: .line 40
            aload 0 /* this */
            invokevirtual io.netty.channel.nio.SelectedSelectionKeySet.increaseCapacity:()V
         5: .line 43
      StackMap locals:
      StackMap stack:
            iconst_1
            ireturn
        end local 1 // java.nio.channels.SelectionKey o
        end local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lio/netty/channel/nio/SelectedSelectionKeySet;
            0    6     1     o  Ljava/nio/channels/SelectionKey;
    MethodParameters:
      Name  Flags
      o     

  public int size();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
         0: .line 48
            aload 0 /* this */
            getfield io.netty.channel.nio.SelectedSelectionKeySet.size:I
            ireturn
        end local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/channel/nio/SelectedSelectionKeySet;

  public boolean remove(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
        start local 1 // java.lang.Object o
         0: .line 53
            iconst_0
            ireturn
        end local 1 // java.lang.Object o
        end local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/channel/nio/SelectedSelectionKeySet;
            0    1     1     o  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      o     

  public boolean contains(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
        start local 1 // java.lang.Object o
         0: .line 58
            iconst_0
            ireturn
        end local 1 // java.lang.Object o
        end local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/channel/nio/SelectedSelectionKeySet;
            0    1     1     o  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      o     

  public java.util.Iterator<java.nio.channels.SelectionKey> iterator();
    descriptor: ()Ljava/util/Iterator;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
         0: .line 63
            new java.lang.UnsupportedOperationException
            dup
            invokespecial java.lang.UnsupportedOperationException.<init>:()V
            athrow
        end local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/channel/nio/SelectedSelectionKeySet;
    Signature: ()Ljava/util/Iterator<Ljava/nio/channels/SelectionKey;>;

  void reset();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
         0: .line 67
            aload 0 /* this */
            iconst_0
            invokevirtual io.netty.channel.nio.SelectedSelectionKeySet.reset:(I)V
         1: .line 68
            return
        end local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/channel/nio/SelectedSelectionKeySet;

  void reset(int);
    descriptor: (I)V
    flags: (0x0000) 
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
        start local 1 // int start
         0: .line 71
            aload 0 /* this */
            getfield io.netty.channel.nio.SelectedSelectionKeySet.keys:[Ljava/nio/channels/SelectionKey;
            iload 1 /* start */
            aload 0 /* this */
            getfield io.netty.channel.nio.SelectedSelectionKeySet.size:I
            aconst_null
            invokestatic java.util.Arrays.fill:([Ljava/lang/Object;IILjava/lang/Object;)V
         1: .line 72
            aload 0 /* this */
            iconst_0
            putfield io.netty.channel.nio.SelectedSelectionKeySet.size:I
         2: .line 73
            return
        end local 1 // int start
        end local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lio/netty/channel/nio/SelectedSelectionKeySet;
            0    3     1  start  I
    MethodParameters:
       Name  Flags
      start  

  private void increaseCapacity();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=2, args_size=1
        start local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
         0: .line 76
            aload 0 /* this */
            getfield io.netty.channel.nio.SelectedSelectionKeySet.keys:[Ljava/nio/channels/SelectionKey;
            arraylength
            iconst_1
            ishl
            anewarray java.nio.channels.SelectionKey
            astore 1 /* newKeys */
        start local 1 // java.nio.channels.SelectionKey[] newKeys
         1: .line 77
            aload 0 /* this */
            getfield io.netty.channel.nio.SelectedSelectionKeySet.keys:[Ljava/nio/channels/SelectionKey;
            iconst_0
            aload 1 /* newKeys */
            iconst_0
            aload 0 /* this */
            getfield io.netty.channel.nio.SelectedSelectionKeySet.size:I
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
         2: .line 78
            aload 0 /* this */
            aload 1 /* newKeys */
            putfield io.netty.channel.nio.SelectedSelectionKeySet.keys:[Ljava/nio/channels/SelectionKey;
         3: .line 79
            return
        end local 1 // java.nio.channels.SelectionKey[] newKeys
        end local 0 // io.netty.channel.nio.SelectedSelectionKeySet this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    4     0     this  Lio/netty/channel/nio/SelectedSelectionKeySet;
            1    4     1  newKeys  [Ljava/nio/channels/SelectionKey;

  public boolean add(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast java.nio.channels.SelectionKey
            invokevirtual io.netty.channel.nio.SelectedSelectionKeySet.add:(Ljava/nio/channels/SelectionKey;)Z
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/util/AbstractSet<Ljava/nio/channels/SelectionKey;>;
SourceFile: "SelectedSelectionKeySet.java"