def plugins_for(type, adapter)
      case type
      when :configuration then configuration
      when :command       then commands.adapter(adapter)
      when :mapper        then mappers.adapter(adapter)
      when :relation      then relations.adapter(adapter)
      when :schema        then schemas.adapter(adapter)
      end
    end
def plugins_for(type, adapter)
      case type
      when :configuration then configuration
      when :command       then commands.adapter(adapter)
      when :mapper        then mappers.adapter(adapter)
      when :relation      then relations.adapter(adapter)
      when :schema        then schemas.adapter(adapter)
      end
    end
Determine which specific registry to use

 @api private