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) 
class org.apache.fop.render.pdf.PDFStructureTreeBuilder$ImageBuilder extends org.apache.fop.render.pdf.PDFStructureTreeBuilder$DefaultStructureElementBuilder
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.apache.fop.render.pdf.PDFStructureTreeBuilder$ImageBuilder
  super_class: org.apache.fop.render.pdf.PDFStructureTreeBuilder$DefaultStructureElementBuilder
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.apache.fop.render.pdf.PDFStructureTreeBuilder$ImageBuilder this
         0: .line 236
            aload 0 /* this */
            getstatic org.apache.fop.pdf.StandardStructureTypes$Illustration.FIGURE:Lorg/apache/fop/pdf/StructureType;
            invokespecial org.apache.fop.render.pdf.PDFStructureTreeBuilder$DefaultStructureElementBuilder.<init>:(Lorg/apache/fop/pdf/StructureType;)V
         1: .line 237
            return
        end local 0 // org.apache.fop.render.pdf.PDFStructureTreeBuilder$ImageBuilder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/fop/render/pdf/PDFStructureTreeBuilder$ImageBuilder;

  protected void setAttributes(org.apache.fop.pdf.PDFStructElem, org.xml.sax.Attributes);
    descriptor: (Lorg/apache/fop/pdf/PDFStructElem;Lorg/xml/sax/Attributes;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=4, args_size=3
        start local 0 // org.apache.fop.render.pdf.PDFStructureTreeBuilder$ImageBuilder this
        start local 1 // org.apache.fop.pdf.PDFStructElem structElem
        start local 2 // org.xml.sax.Attributes attributes
         0: .line 241
            aload 2 /* attributes */
            ldc "http://xmlgraphics.apache.org/fop/extensions"
            ldc "alt-text"
            invokeinterface org.xml.sax.Attributes.getValue:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
            astore 3 /* altTextNode */
        start local 3 // java.lang.String altTextNode
         1: .line 242
            aload 3 /* altTextNode */
            ifnonnull 3
         2: .line 243
            ldc "No alternate text specified"
            astore 3 /* altTextNode */
         3: .line 245
      StackMap locals: java.lang.String
      StackMap stack:
            aload 1 /* structElem */
            ldc "Alt"
            aload 3 /* altTextNode */
            invokevirtual org.apache.fop.pdf.PDFStructElem.put:(Ljava/lang/String;Ljava/lang/Object;)V
         4: .line 246
            return
        end local 3 // java.lang.String altTextNode
        end local 2 // org.xml.sax.Attributes attributes
        end local 1 // org.apache.fop.pdf.PDFStructElem structElem
        end local 0 // org.apache.fop.render.pdf.PDFStructureTreeBuilder$ImageBuilder this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    5     0         this  Lorg/apache/fop/render/pdf/PDFStructureTreeBuilder$ImageBuilder;
            0    5     1   structElem  Lorg/apache/fop/pdf/PDFStructElem;
            0    5     2   attributes  Lorg/xml/sax/Attributes;
            1    5     3  altTextNode  Ljava/lang/String;
    MethodParameters:
            Name  Flags
      structElem  
      attributes  
}
SourceFile: "PDFStructureTreeBuilder.java"
NestHost: org.apache.fop.render.pdf.PDFStructureTreeBuilder
InnerClasses:
  public final Illustration = org.apache.fop.pdf.StandardStructureTypes$Illustration of org.apache.fop.pdf.StandardStructureTypes
  private DefaultStructureElementBuilder = org.apache.fop.render.pdf.PDFStructureTreeBuilder$DefaultStructureElementBuilder of org.apache.fop.render.pdf.PDFStructureTreeBuilder
  private ImageBuilder = org.apache.fop.render.pdf.PDFStructureTreeBuilder$ImageBuilder of org.apache.fop.render.pdf.PDFStructureTreeBuilder