[]
AnnotationTypeName:
"Text"
|"Link"
|"FreeText"
|"Line"
|"Square"
|"Circle"
|"Polygon"
|"PolyLine"
|"Highlight"
|"Underline"
|"Squiggly"
|"Strikeout"
|"StrikeOut"
|"Stamp"
|"Caret"
|"Ink"
|"Popup"
|"FileAttachment"
|"Sound"
|"Movie"
|"Widget"
|"Screen"
|"PrinterMark"
|"TrapNet"
|"WaterMark"
|"Redact"
|"Signature"
|"ThreadBead"
|"RadioButton"
|"Checkbox"
|"PushButton"
|"Choice"
|"TextWidget"
|"RichMedia"
|"ReplaceText"
Annotation type name.