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: event_formatter.rb
    path of file: ./repos/newrelic-ruby-agent/lib/new_relic/agent/datastores/mongo
    
    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_relative '../nosql_obfuscator'

module NewRelic
  module Agent
    module Datastores
      module Mongo
        module EventFormatter
          # Keys that will get their values replaced with '?'.
          OBFUSCATE_
    
          def self.format(command_name, database_name, command)
            return nil unless NewRelic::Agent.config[:'mongo.capture_queries']

            result = {
              :operation => command_name,
              :database => database_name,
              :collection => command.values.first
            }

            command.each do |key, value|
              next if DENYLISTED_KEYS.include?(key)

              if OBFUSCATE_KEYS.include?(key)
                obfuscated = obfuscate(value)
                result[key] = obfuscated if obfuscated
              else
                result[key] = value
              end
            end