parameters: (self, field, bson_element_variable)
docstring: Add a field to track.
docstring_summary: Add a field to track.
docstring_tokens: Add a field to track .
function: def add(self, field, bson_element_variable):
          # type: (ast.Field, str) -> None
          """Add a field to track."""
          pass
function_tokens: def add ( self , field , bson_element_variable ) : # type: (ast.Field, str) -> None pass