Alchemy.Client.get_prune_count

You're seeing just the function get_prune_count, go back to Alchemy.Client module for more information.
Link to this function

get_prune_count(guild_id, days)

Specs

get_prune_count(snowflake(), Integer) :: {:ok, nil} | {:error, term()}

Returns a count of members who would be kicked in a prune operation.

Days specifies the amount of days of inactivity to check for.

See prune_guild/2 for a discussion of this operation.