we could specify the connector as a symbol or as a class for stricter typing:

SearchClient.new(connector: :elastic)
SearchClient.new(connector: ElasticConnector)

case :connector_type
when :elastic then Gitlab::Search::ElasticConnector
end

class IssueSearchEndpoint
  def initialize
    @client = init_search_client
  end

  private

  def init_search_client
    # logic
    conn = if ee?
      ElasticConnector
    else
      IssueFinderConnector
    end

    SearchClient.new(connector: conn)
  end
end

class ConnectorDetector
  def use_advanced_search?(params)
    # logic
    true
  end
end

IssueFinderConnector

class IssueFinderConnector
  def search(params, ctx)
    # logic on handling params would go here
    IssueFinder.new(ctx.current_user, params).execute
  end
end