# File lib/moped/indexes.rb, line 55
    def create(key, options = {})
      spec = options.merge(ns: namespace, key: key)
      spec[:name] ||= key.to_a.join("_")

      database.session.with(write: { w: 1 }) do |_s|
        _s["system.indexes""system.indexes"].insert(spec)
      end
    end