http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
public class org.apache.fop.util.AbstractPaintingState$StateStack<E> extends java.util.Stack<E>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.fop.util.AbstractPaintingState$StateStack
  super_class: java.util.Stack
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 4897178211223823041

  final org.apache.fop.util.AbstractPaintingState this$0;
    descriptor: Lorg/apache/fop/util/AbstractPaintingState;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  public void <init>(org.apache.fop.util.AbstractPaintingState);
    descriptor: (Lorg/apache/fop/util/AbstractPaintingState;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.apache.fop.util.AbstractPaintingState$StateStack this
         0: .line 395
            aload 0 /* this */
            aload 1
            putfield org.apache.fop.util.AbstractPaintingState$StateStack.this$0:Lorg/apache/fop/util/AbstractPaintingState;
            aload 0 /* this */
            invokespecial java.util.Stack.<init>:()V
         1: .line 396
            return
        end local 0 // org.apache.fop.util.AbstractPaintingState$StateStack this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/fop/util/AbstractPaintingState$StateStack<TE;>;
    MethodParameters:
        Name  Flags
      this$0  final

  public void <init>(org.apache.fop.util.AbstractPaintingState, java.util.Collection);
    descriptor: (Lorg/apache/fop/util/AbstractPaintingState;Ljava/util/Collection;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // org.apache.fop.util.AbstractPaintingState$StateStack this
        start local 2 // java.util.Collection c
         0: .line 403
            aload 0 /* this */
            aload 1
            putfield org.apache.fop.util.AbstractPaintingState$StateStack.this$0:Lorg/apache/fop/util/AbstractPaintingState;
            aload 0 /* this */
            invokespecial java.util.Stack.<init>:()V
         1: .line 404
            aload 0 /* this */
            aload 2 /* c */
            invokeinterface java.util.Collection.size:()I
            putfield org.apache.fop.util.AbstractPaintingState$StateStack.elementCount:I
         2: .line 406
            aload 0 /* this */
         3: .line 407
            aload 0 /* this */
            getfield org.apache.fop.util.AbstractPaintingState$StateStack.elementCount:I
            i2l
            ldc 110
            lmul
            ldc 100
            ldiv
            ldc 2147483647
            invokestatic java.lang.Math.min:(JJ)J
            l2i
         4: .line 406
            anewarray java.lang.Object
            putfield org.apache.fop.util.AbstractPaintingState$StateStack.elementData:[Ljava/lang/Object;
         5: .line 408
            aload 2 /* c */
            aload 0 /* this */
            getfield org.apache.fop.util.AbstractPaintingState$StateStack.elementData:[Ljava/lang/Object;
            invokeinterface java.util.Collection.toArray:([Ljava/lang/Object;)[Ljava/lang/Object;
            pop
         6: .line 409
            return
        end local 2 // java.util.Collection c
        end local 0 // org.apache.fop.util.AbstractPaintingState$StateStack this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lorg/apache/fop/util/AbstractPaintingState$StateStack<TE;>;
            0    7     2     c  Ljava/util/Collection;
    MethodParameters:
        Name  Flags
      this$0  final
      c       
}
Signature: <E:Ljava/lang/Object;>Ljava/util/Stack<TE;>;
SourceFile: "AbstractPaintingState.java"
NestHost: org.apache.fop.util.AbstractPaintingState
InnerClasses:
  public StateStack = org.apache.fop.util.AbstractPaintingState$StateStack of org.apache.fop.util.AbstractPaintingState