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: trace.rb
    path of file: ./repos/newrelic-ruby-agent/lib/new_relic/agent/transaction
    
    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

require 'new_relic/agent/transaction/trace_node'
    
        def collect_explain_plans!
          return unless NewRelic::Agent::Database.should_collect_explain_plans?

          threshold = NewRelic::Agent.config[:'transaction_tracer.explain_threshold']

          each_node do |node|
            if node[:sql] && node.duration > threshold
              node[:explain_plan] = node.explain_sql
            end
          end