I am trying to extract information related to "Add Text Callout" annotation tool from pdf. I get to know from initial research that it's a "FreeText" type annotation and it's intent is "FreeTextCallout". But I am unable to figure out like how can I get the rectangle info for both the box and arrow attached to it. I am able to get the bounding box which encloses both the markups. I don't know it's already implemented or not.