What can readers infer about the dickey?

Its a outdated piece of clothing  

Explanation: I did it on study island

this answer was editing it cause i couldn't delete!

  this riddles' answer is library.

  the "leaves" are a reference to the books' pages that the library contains; the branches are a network of libraries that connect multiple libraries' collections, resources, and items in a system of a common database, integrating them; the branches' organization are a useful management tool for coordinating the multiple collections many libraries have.