support multiple methods of collision resolution.

Do you plan to support multiple methods of collision resolution? If not, why don't you say `In this case the samples are averaged` to avoid confusion over whether there are multiple options to handle this case.

_Originally posted by @gwarmstrong in https://github.com/cameronmartino/gemelli/diffs_

No file or test is named in the issue. First locate the documentation or message describing collision resolution and determine whether multiple methods are supported. Done when the text clearly states that samples are averaged, or documents the available methods and rationale.

Written by the indexing model from the issue text.