Only auto populate neighborhood field if not empty

I have a field for the neighborhood. Sometimes google will return a neighborhood value for an address and this will autopopulate because the field ID auto binds:

array(
    'type' => 'text',
    'name' => __('Neighborhood', 'psych-info'),
    'id'    => 'neighborhood',
),

The issue is when google does not return a neighborhood value, then this field is cleared of any existing value. I know I can change the ID to prevent the auto-binding, but maybe this could be improved?

I can think of a couple of workarounds:

1. add a fill bind_if_empty flag in the plugin:

   array(
       'type' => 'text',
       'name' => __('Neighborhood', 'psych-info'),
       'id'    => 'neighborhood',
       'binding' => 'neighborhood',
       'bind_if_empty' => false,  //default true
   ),
   

   bind_if_empty might also accept a secondary field to bind if the first field is empty:

   'binding' => 'neighborhood',
   'bind_if_empty' => 'sublocality'
   

2. Allow the binding to be filtered by a function

I am happy to extend the plugin. If so, is there a private repo I can submit a pull request to?

P.S. There is a typo in the Features section on the extension's page:

Auto popular all location fields when user enter an address

should read:
Auto populate all location fields...