[wp-trac] [WordPress Trac] #24531: Add subpage_file Filter Before Admin Menu

[WordPress Trac]

#24531: Add subpage_file Filter Before Admin Menu
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 Reporter:  Nessworthy      |       Owner:
     Type:  enhancement     |      Status:  new
 Priority:  normal          |   Milestone:  4.4
Component:  Administration  |     Version:
 Severity:  normal          |  Resolution:
 Keywords:  has-patch       |     Focuses:
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Comment (by SergeyBiryukov):

 Let's add `$parent_file` as a second argument.

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Ticket URL: <https://core.trac.wordpress.org/ticket/24531#comment:4>
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