title: It is possible to have a contains search query in firebase?
body: <p>I tried this:</p>
  
  <pre><code>Query firebaseSearchQuery = 
  myRef.orderByChild("from").startAt(searchText).endAt(searchText+"\uf8ff");
  </code></pre>
  
  <p>but i want something like this</p>
  
  <pre><code>Query firebaseSearchQuery = 
  myRef.orderByChild("from").contains(searchText);
  </code></pre>
  
  <p>it is possible ?</p>