code: def _process_field_queries(field_dictionary):
      
      def field_item(field):
          """ format field match as "match" item for elasticsearch query """
          return {
              "match": {
                  field: field_dictionary[field]
              }
          }
  
      return [field_item(field) for field in field_dictionary]
docs: We have a field_dictionary - we want to match the values for an elasticsearch "match" query
      This is only potentially useful when trying to tune certain search operations