/usr/lib/R/site-library/interactiveDisplayBase/INDEX is in r-bioc-interactivedisplaybase 1.16.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 | .runApp                 Run a shiny app, capturing results to the R
                        session
display                 display: Open a Shiny application for a
                        Bioconductor object
 |