How to Find a Concrete Available Has a Context Link

Now I am reading a Roman Guy tutorial Avoid memory leak , there is the following sentence:

Drawable is attached to the view, the view is set as a callback to drawable. In the code snippet above, this means that drawable has a link to TextView`, Text on a web page .

How to find that drawable has a context link or not?

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, ( ), , , ( ). , .

drawable , - , /.

, :)

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