Name
  annot:SetLineAnnotCaption -- set line annotation caption
Synopsis

      status = annot:SetLineAnnotCaption(show, pos, horz, vert)

Function
  This method is currently undocumented in libHaru. Complain to the libHaru authors.

  The `pos` argument must be one of the following constants:

      #HPDF_LINE_ANNOT_CAP_INLINE
      #HPDF_LINE_ANNOT_CAP_TOP

  Returns `#HPDF_OK` on success. Otherwise, returns an error code and the error handler is invoked.

Inputs
  show
    boolean value that indicates whether to show the caption
  pos
    caption position (see above for possible values)
  horz
    horizontal offset
  vert
    vertical offset
Results
  status
    status code

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