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: seamless_database_pool_adapter.rb
    path of file: ./repos/seamless_database_pool/lib/active_record/connection_adapters
    
    the code of the file until where you have to start completion: module ActiveRecord
  class Base
    class << self
      def seamless_database_pool_connection(config)
        pool_weights = {}

        config = config.with_indifferent_access
        default_config = {:pool_weight => 1}.merge(config.merge(:adapter => config
    
      def establish_adapter(adapter)
        raise AdapterNotSpecified.new("database configuration does not specify adapter") unless adapter
        raise AdapterNotFound.new("database pool must specify adapters") if adapter == 'seamless_database_pool'
      
        begin
          require 'rubygems'
          gem "activerecord-#{adapter}-adapter"
          require "active_record/connection_adapters/#{adapter}_adapter"
        rescue LoadError
          begin
            require "active_record/connection_adapters/#{adapter}_adapter"
          rescue LoadError
            raise LoadError.new("Please install the #{adapter} adapter: `gem install activerecord-#{adapter}-adapter` (#{$!})")
          end
        end