developer@developer-VirtualBox:~/mupdf$ mutool show ~/pdf/a.pdf 1
1 0 obj
<<
  /AcroForm 83 0 R
  /Metadata 81 0 R
  /OCProperties <<
    /D <<
      /Order [ ]
      /RBGroups [ ]
    >>
    /OCGs [ 92 0 R ]
  >>
  /Pages 53 0 R
  /Type /Catalog
>>
endobj