You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: loose_foreign_keys_slis.rb
    path of file: ./repos/gitlabhq/lib/gitlab/metrics
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Gitlab
  module Metrics
    module LooseForeignKeysSlis
      class << self
        def initialize_sli
    
        def possible_labels
          ::Gitlab::Database.db_config_names(with_schema: :gitlab_shared).map do |db_config_name|
            {
              db_config_name: db_config_name,
              feature_category: :database
            }
          end
        end