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[Zsombor Egri <1534673@xxxxxxxxxxxxxxxxxx>]

The removePages() removes any high-numbered column page and itself. Do I
get it right that you would like one which does the same except keeps
the page given as parameter?

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https://bugs.launchpad.net/bugs/1534673

Title:
  [AdaptivePageLayout] Add function to clear higher columns of pages

Status in ubuntu-ui-toolkit package in Ubuntu:
  Triaged

Bug description:
  Please add a function that will allow the developer to remove pages
  from any higher-numbered columns than itself. This is similar to
  removePages(targetPage) except that it does not remove the targetPage
  or any pages in it's column.

  Suggestion:

  removeChildPages(targetPage)

  Use Case:

  in uReadIt I have a SubredditGalleryPage, which allows the user to
  swipe back and forth through images from a subreddit like /r/funny.
  This will occupy the 2nd column in my layout. Each image can have a
  CommentsPage for it's comments opened in the 3rd column. When a
  CommentsPage is opened for an image in SubredditGalleryPage, and the
  user changes to another image, I would like to close the CommentsPage
  and any child of it (such as a PostMessagePage)

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