static PdfChunk()
{
keysAttributes.Add(Chunk.ACTION, null);
keysAttributes.Add(Chunk.UNDERLINE, null);
keysAttributes.Add(Chunk.REMOTEGOTO, null);
keysAttributes.Add(Chunk.LOCALGOTO, null);
keysAttributes.Add(Chunk.LOCALDESTINATION, null);
keysAttributes.Add(Chunk.GENERICTAG, null);
keysAttributes.Add(Chunk.NEWPAGE, null);
keysAttributes.Add(Chunk.IMAGE, null);
keysAttributes.Add(Chunk.BACKGROUND, null);
keysAttributes.Add(Chunk.PDFANNOTATION, null);
keysAttributes.Add(Chunk.SKEW, null);
keysAttributes.Add(Chunk.HSCALE, null);
keysAttributes.Add(Chunk.SEPARATOR, null);
keysAttributes.Add(Chunk.TAB, null);
keysAttributes.Add(Chunk.TABSPACE, null);
keysAttributes.Add(Chunk.CHAR_SPACING, null);
keysAttributes.Add(Chunk.LINEHEIGHT, null);
keysNoStroke.Add(Chunk.SUBSUPSCRIPT, null);
keysNoStroke.Add(Chunk.SPLITCHARACTER, null);
keysNoStroke.Add(Chunk.HYPHENATION, null);
keysNoStroke.Add(Chunk.TEXTRENDERMODE, null);
}