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"
注釈の種類名。