...
Deletes files from S3.
returns
Nothing.
Scenarios
The development cycle: 
Discover, retrieve
...
, load and run code
...
A user, browsing Synapse, sees a piece of code of interest (mentioned in a discussion or used in an analysis), and clicks on it. She sees:
...
and begins by executing this in R.
Discover, retrieve and load code into R session
Retrieve existing code, modify and save.
...