How to make Page or ContentEntityObject from Content object?

[Alexander Demchenko]

Hi, there

I use ContentService instead PageManager

see https://community.atlassian.com/t5/Confluence-questions/How-to-use-ContentService-instead-of-PageManager/qaq-p/1546008

But I need to get Page object. Instead I've got Content object.

How to convert Content object to Page or ContentEntityObject?