title: Are Cloud Firestore subcollections included in document size calculation
body: <p>If a document in Cloud Firestore has a subcollection, are the documents in those subcollection included in the parent document's size?  For example, if I have data like:</p>
  
  <pre><code>rootCollection/
      parentDocument:
          field1: "value1"
          field2: "value2"
          ...
          subCollection/
             childDocument:
                  anotherField: "OfGreen" 
                  ...
  </code></pre>
  
  <p>is the size of <code>childDocument</code> included in the size of <code>parentDocument</code></p>
  
  <p>From the <a href="https://firebase.google.com/docs/firestore/storage-size" rel="noreferrer">storage size calculation documentation</a>, it doesn't sound like the contents of subcollections are included in the parent document sizes, but I just wanted to clarify.  </p>
  
  <p>Thanks!</p>