old_contents: const MessageAlreadySentError = require('./MessageAlreadySentError')
  const MessageFailedError = require('./MessageFailedError')
  const PluginDoesNotExistError = require('./PluginDoesNotExistError')
  const PluginInitFailedError = require('./PluginInitFailedError')
  const PluginFailedToSendError = require('./PluginFailedToSendError')
  let Errors = {
      MessageAlreadySentError,
      MessageFailedError,
      PluginDoesNotExistError,
      PluginInitFailedError,
      PluginFailedToSendError
  }
  
  module.exports = Errors
new_contents: const MessageAlreadySentError = require('./MessageAlreadySentError')
  const MessageFailedError = require('./MessageFailedError')
  const PluginDoesNotExistError = require('./PluginDoesNotExistError')
  const PluginInitFailedError = require('./PluginInitFailedError')
  const PluginFailedToSendError = require('./PluginFailedToSendError')
  class ResourceNotFoundError extends Error { }
  class InvalidParameterValueError extends Error { }
  let Errors = {
      MessageAlreadySentError,
      MessageFailedError,
      PluginDoesNotExistError,
      PluginInitFailedError,
      PluginFailedToSendError,
      ResourceNotFoundError,
      InvalidParameterValueError
  }
  
  module.exports = Errors
subject: Add extra errors, start to move away from common-errors