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: server_source.rb
    path of file: ./repos/newrelic-ruby-agent/lib/new_relic/agent/configuration
    
    the code of the file until where you have to start completion: # This file is distributed under New Relic's license terms.
# See https://github.com/newrelic/newrelic-ruby-agent/blob/main/LICENSE for complete details.
# frozen_string_literal: true

module NewRelic
  module Agent
    module Configuration
      class ServerSource < DottedHash
        # These keys appear *outside* of the agent_config hash in the connect
        # response, but should still be merged in as config settings to the
        # main agent configuration.
        TOP_LEVEL_KEYS = [
          'account_id',
          'apdex_t',
          'applica
    
        def apply_feature_gates(merged_settings, connect_reply, existing_config)
          gated_features = {
            'transaction_tracer.enabled' => 'collect_traces',
            'slow_sql.enabled' => 'collect_traces',
            'error_collector.enabled' => 'collect_errors',
            'transaction_events.enabled' => 'collect_analytics_events',
            'custom_insights_events.enabled' => 'collect_custom_events',
            'error_collector.capture_events' => 'collect_error_events',
            'span_events.enabled' => 'collect_span_events'
          }
          gated_features.each do |config_key, gate_key|
            if connect_reply.has_key?(gate_key)
              allowed_by_server = connect_reply[gate_key]
              requested_value = ungated_value(config_key, merged_settings, existing_config)
              effective_value = (allowed_by_server && requested_value)
              merged_settings[config_key] = effective_value
            end
          end