function _normalizeParameters(parameters) {
  parameters = parameters || Object.create(null)
  const config = this.agent.config
  const dsTracerConf = config.datastore_tracer

  parameters.product = parameters.product || this._datastore

  _normalizeDatabaseName(parameters, dsTracerConf)
  _normalizeInstanceInformation(parameters, dsTracerConf, config)

  return parameters
}
Normalizes segment parameter values.

- `_normalizeParameters([parameters])`

Removes disabled parameters and corrects other values, such as changing host
from `localhost` to the actual host name.

@private
@this DatastoreShim
@param {object} [parameters] - The segment parameters to clean up.
@returns {object} - The normalized segment parameters.