Giza.SphinxQL.option

You're seeing just the function option, go back to Giza.SphinxQL module for more information.
Link to this function

option(query, option)

Returns a SphinxQL query with an option added such as used for the expression ranker

Examples

iex> SphinxQL.new()
|> SphinxQL.option("ranker=expr('sum(lcs*user_weight)*1000+bm25'))")
|> SphinxQL.send()

%SphinxqlResponse{ .. }