http://www.jboss.org/undertow-parent/undertow-core: Undertow (JBoss by Red Hat) 
class io.undertow.util.HeaderValues$1 implements java.util.ListIterator<java.lang.String>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: io.undertow.util.HeaderValues$1
  super_class: java.lang.Object
{
  int idx;
    descriptor: I
    flags: (0x0000) 

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

  final io.undertow.util.HeaderValues this$0;
    descriptor: Lio/undertow/util/HeaderValues;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private final boolean val$forwards;
    descriptor: Z
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(io.undertow.util.HeaderValues, int, boolean);
    descriptor: (Lio/undertow/util/HeaderValues;IZ)V
    flags: (0x0000) 
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // io.undertow.util.HeaderValues$1 this
         0: .line 104
            aload 0 /* this */
            aload 1
            putfield io.undertow.util.HeaderValues$1.this$0:Lio/undertow/util/HeaderValues;
            aload 0 /* this */
            iload 3
            putfield io.undertow.util.HeaderValues$1.val$forwards:Z
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 105
            aload 0 /* this */
            iload 2
            putfield io.undertow.util.HeaderValues$1.idx:I
         2: .line 106
            aload 0 /* this */
            iconst_m1
            putfield io.undertow.util.HeaderValues$1.returned:I
         3: .line 104
            return
        end local 0 // io.undertow.util.HeaderValues$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lio/undertow/util/HeaderValues$1;
    MethodParameters:
              Name  Flags
      this$0        final
      val$start     final
      val$forwards  final

  public boolean hasNext();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // io.undertow.util.HeaderValues$1 this
         0: .line 109
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.idx:I
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.this$0:Lio/undertow/util/HeaderValues;
            getfield io.undertow.util.HeaderValues.size:B
            if_icmpge 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 0 // io.undertow.util.HeaderValues$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/undertow/util/HeaderValues$1;

  public boolean hasPrevious();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.undertow.util.HeaderValues$1 this
         0: .line 113
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.idx:I
            ifle 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 0 // io.undertow.util.HeaderValues$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/undertow/util/HeaderValues$1;

  public java.lang.String next();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=1
        start local 0 // io.undertow.util.HeaderValues$1 this
         0: .line 119
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.val$forwards:Z
            ifeq 7
         1: .line 120
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.idx:I
            istore 2 /* idx */
        start local 2 // int idx
         2: .line 121
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.this$0:Lio/undertow/util/HeaderValues;
            iload 2 /* idx */
            invokevirtual io.undertow.util.HeaderValues.get:(I)Ljava/lang/String;
            astore 1 /* next */
        start local 1 // java.lang.String next
         3: .line 122
            aload 0 /* this */
            iload 2 /* idx */
            putfield io.undertow.util.HeaderValues$1.returned:I
         4: .line 123
            aload 0 /* this */
            iload 2 /* idx */
            iconst_1
            iadd
            putfield io.undertow.util.HeaderValues$1.idx:I
         5: .line 124
            aload 1 /* next */
         6: areturn
        end local 2 // int idx
        end local 1 // java.lang.String next
         7: .line 126
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.idx:I
            iconst_1
            isub
            istore 2 /* idx */
        start local 2 // int idx
         8: .line 127
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.this$0:Lio/undertow/util/HeaderValues;
            iload 2 /* idx */
            invokevirtual io.undertow.util.HeaderValues.get:(I)Ljava/lang/String;
            astore 1 /* next */
        start local 1 // java.lang.String next
         9: .line 128
            aload 0 /* this */
            aload 0 /* this */
            iload 2 /* idx */
            dup_x1
            putfield io.undertow.util.HeaderValues$1.returned:I
            putfield io.undertow.util.HeaderValues$1.idx:I
        end local 2 // int idx
        10: .line 130
            aload 1 /* next */
        11: areturn
        end local 1 // java.lang.String next
        12: .line 131
      StackMap locals:
      StackMap stack: java.lang.IndexOutOfBoundsException
            pop
        13: .line 132
            new java.util.NoSuchElementException
            dup
            invokespecial java.util.NoSuchElementException.<init>:()V
            athrow
        end local 0 // io.undertow.util.HeaderValues$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   14     0  this  Lio/undertow/util/HeaderValues$1;
            3    7     1  next  Ljava/lang/String;
            9   12     1  next  Ljava/lang/String;
            2    7     2   idx  I
            8   10     2   idx  I
      Exception table:
        from    to  target  type
           0     6      12  Class java.lang.IndexOutOfBoundsException
           7    11      12  Class java.lang.IndexOutOfBoundsException

  public int nextIndex();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.undertow.util.HeaderValues$1 this
         0: .line 137
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.idx:I
            ireturn
        end local 0 // io.undertow.util.HeaderValues$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/undertow/util/HeaderValues$1;

  public java.lang.String previous();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=1
        start local 0 // io.undertow.util.HeaderValues$1 this
         0: .line 143
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.val$forwards:Z
            ifeq 5
         1: .line 144
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.idx:I
            iconst_1
            isub
            istore 2 /* idx */
        start local 2 // int idx
         2: .line 145
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.this$0:Lio/undertow/util/HeaderValues;
            iload 2 /* idx */
            invokevirtual io.undertow.util.HeaderValues.get:(I)Ljava/lang/String;
            astore 1 /* prev */
        start local 1 // java.lang.String prev
         3: .line 146
            aload 0 /* this */
            aload 0 /* this */
            iload 2 /* idx */
            dup_x1
            putfield io.undertow.util.HeaderValues$1.returned:I
            putfield io.undertow.util.HeaderValues$1.idx:I
        end local 2 // int idx
         4: .line 147
            goto 11
        end local 1 // java.lang.String prev
         5: .line 148
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.idx:I
            istore 2 /* idx */
        start local 2 // int idx
         6: .line 149
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.this$0:Lio/undertow/util/HeaderValues;
            iload 2 /* idx */
            invokevirtual io.undertow.util.HeaderValues.get:(I)Ljava/lang/String;
            astore 1 /* prev */
        start local 1 // java.lang.String prev
         7: .line 150
            aload 0 /* this */
            iload 2 /* idx */
            putfield io.undertow.util.HeaderValues$1.returned:I
         8: .line 151
            aload 0 /* this */
            iload 2 /* idx */
            iconst_1
            iadd
            putfield io.undertow.util.HeaderValues$1.idx:I
         9: .line 152
            aload 1 /* prev */
        10: areturn
        end local 2 // int idx
        11: .line 154
      StackMap locals: java.lang.String
      StackMap stack:
            aload 1 /* prev */
        12: areturn
        end local 1 // java.lang.String prev
        13: .line 155
      StackMap locals: io.undertow.util.HeaderValues$1
      StackMap stack: java.lang.IndexOutOfBoundsException
            pop
        14: .line 156
            new java.util.NoSuchElementException
            dup
            invokespecial java.util.NoSuchElementException.<init>:()V
            athrow
        end local 0 // io.undertow.util.HeaderValues$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   15     0  this  Lio/undertow/util/HeaderValues$1;
            3    5     1  prev  Ljava/lang/String;
            7   13     1  prev  Ljava/lang/String;
            2    4     2   idx  I
            6   11     2   idx  I
      Exception table:
        from    to  target  type
           0    10      13  Class java.lang.IndexOutOfBoundsException
          11    12      13  Class java.lang.IndexOutOfBoundsException

  public int previousIndex();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // io.undertow.util.HeaderValues$1 this
         0: .line 161
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.idx:I
            iconst_1
            isub
            ireturn
        end local 0 // io.undertow.util.HeaderValues$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/undertow/util/HeaderValues$1;

  public void remove();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // io.undertow.util.HeaderValues$1 this
         0: .line 165
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.returned:I
            iconst_m1
            if_icmpne 2
         1: .line 166
            new java.lang.IllegalStateException
            dup
            invokespecial java.lang.IllegalStateException.<init>:()V
            athrow
         2: .line 168
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.this$0:Lio/undertow/util/HeaderValues;
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.returned:I
            invokevirtual io.undertow.util.HeaderValues.remove:(I)Ljava/lang/String;
            pop
         3: .line 169
            aload 0 /* this */
            iconst_m1
            putfield io.undertow.util.HeaderValues$1.returned:I
         4: .line 170
            return
        end local 0 // io.undertow.util.HeaderValues$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lio/undertow/util/HeaderValues$1;

  public void set(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // io.undertow.util.HeaderValues$1 this
        start local 1 // java.lang.String headerValue
         0: .line 173
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.returned:I
            iconst_m1
            if_icmpne 2
         1: .line 174
            new java.lang.IllegalStateException
            dup
            invokespecial java.lang.IllegalStateException.<init>:()V
            athrow
         2: .line 176
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.this$0:Lio/undertow/util/HeaderValues;
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.returned:I
            aload 1 /* headerValue */
            invokevirtual io.undertow.util.HeaderValues.set:(ILjava/lang/String;)Ljava/lang/String;
            pop
         3: .line 177
            return
        end local 1 // java.lang.String headerValue
        end local 0 // io.undertow.util.HeaderValues$1 this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    4     0         this  Lio/undertow/util/HeaderValues$1;
            0    4     1  headerValue  Ljava/lang/String;
    MethodParameters:
             Name  Flags
      headerValue  final

  public void add(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // io.undertow.util.HeaderValues$1 this
        start local 1 // java.lang.String headerValue
         0: .line 180
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.returned:I
            iconst_m1
            if_icmpne 2
         1: .line 181
            new java.lang.IllegalStateException
            dup
            invokespecial java.lang.IllegalStateException.<init>:()V
            athrow
         2: .line 183
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.idx:I
            istore 2 /* idx */
        start local 2 // int idx
         3: .line 184
            aload 0 /* this */
            getfield io.undertow.util.HeaderValues$1.this$0:Lio/undertow/util/HeaderValues;
            iload 2 /* idx */
            aload 1 /* headerValue */
            invokevirtual io.undertow.util.HeaderValues.add:(ILjava/lang/String;)V
         4: .line 185
            aload 0 /* this */
            iload 2 /* idx */
            iconst_1
            iadd
            putfield io.undertow.util.HeaderValues$1.idx:I
         5: .line 186
            aload 0 /* this */
            iconst_m1
            putfield io.undertow.util.HeaderValues$1.returned:I
         6: .line 187
            return
        end local 2 // int idx
        end local 1 // java.lang.String headerValue
        end local 0 // io.undertow.util.HeaderValues$1 this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    7     0         this  Lio/undertow/util/HeaderValues$1;
            0    7     1  headerValue  Ljava/lang/String;
            3    7     2          idx  I
    MethodParameters:
             Name  Flags
      headerValue  final

  public void set(java.lang.Object);
    descriptor: (Ljava/lang/Object;)V
    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.lang.String
            invokevirtual io.undertow.util.HeaderValues$1.set:(Ljava/lang/String;)V
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.lang.Object next();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual io.undertow.util.HeaderValues$1.next:()Ljava/lang/String;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.lang.Object previous();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual io.undertow.util.HeaderValues$1.previous:()Ljava/lang/String;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void add(java.lang.Object);
    descriptor: (Ljava/lang/Object;)V
    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.lang.String
            invokevirtual io.undertow.util.HeaderValues$1.add:(Ljava/lang/String;)V
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/ListIterator<Ljava/lang/String;>;
SourceFile: "HeaderValues.java"
EnclosingMethod: io.undertow.util.HeaderValues.iterator:(IZ)Ljava/util/ListIterator;
NestHost: io.undertow.util.HeaderValues
InnerClasses:
  io.undertow.util.HeaderValues$1