title: What is `COLUMN_NAME_NULLABLE`
body: <p>I was going through the <a href="https://developer.android.com/training/basics/data-storage/databases.html#WriteDbRow" rel="nofollow">Android Documentation</a> of how to do database operations on Android using SqlLite. In the "Put information into database" section the insert() method takes 3 parameters</p>
  
  <p>1) Table Name<br>
  2) .COLUMN_NAME_NULLABLE<br>
  3) values</p>
  
  <p>The documentation below it says <code>'COLUMN_NAME_NULLABLE' the second argument provides the name of a column in which the framework can insert NULL in the event that the ContentValues is empty (if you instead set this to "null", then the framework will not insert a row when there are no values).</code></p>
  
  <p>But i do not have any field in FeedEntry class with a value as 'COLUMN_NAME_NULLABLE'. I do not understand from where this is coming from.</p>