code: function configureRegion(context) {
    // Resolve the AWS region, if it is not already defined on the context
    if (!context.region) {
      context.region = getRegion();
    }
    const msg = `Using region (${process.env.AWS_REGION}) & context.region (${context.region})`;
    context.debug ? context.debug(msg) : console.log(msg);
    return context;
  }
docs: Keeps context.region as is if it's already configured on the given context, otherwise gets the current region from
  process.env.AWS_REGION and sets it on the context as context.region.
  @param {Object|RegionAware} context - a context on which to set the region
  @returns {RegionAware} the context with its existing region or the current AWS_REGION env variable value.