code: function simplifyKeysNewImageAndOldImage(dynamodbProperty) {
    if (dynamodbProperty) {
      if (dynamodbProperty.Keys) {
        dynamodbProperty.keys = toObjectFromDynamoDBMap(dynamodbProperty.Keys);
        delete dynamodbProperty.Keys;
      }
      if (dynamodbProperty.NewImage) {
        dynamodbProperty.newImage = toObjectFromDynamoDBMap(dynamodbProperty.NewImage);
        delete dynamodbProperty.NewImage;
      }
      if (dynamodbProperty.OldImage) {
        dynamodbProperty.oldImage = toObjectFromDynamoDBMap(dynamodbProperty.OldImage);
        delete dynamodbProperty.OldImage;
      }
    }
    return dynamodbProperty;
  }
docs: Converts and replaces all of the original DynamoDB attribute type & value format "Keys", "NewImage" and "OldImage"
  properties (if any) on the given dynamodb property object with corresponding new simple object format "keys",
  "newImage" and "oldImage" properties (each converted using {@link toObjectFromDynamoDBMap}). Deletes the original
  "Keys", "NewImage" and "OldImage" properties from the given dynamodb property object after conversion.
  @param {DynamodbProperty|SimpleDynamodbProperty} dynamodbProperty - a dynamodb object property
  @returns {SimpleDynamodbProperty} the converted, simple objects only form of the given dynamodb property