bug: Computed property in object literal gives 'unable to extract property' error

[dmeehan1968]

const TableName = asl.deploy.getParameter('MigrationTableName')

await asl.sdk(DynamoDB).batchWriteItem({
    parameters: {
        RequestItems: {
            [TableName]: migratedItems.map(item => ({
                PutRequest: {
                    Item: item,
                }
            }))
        }
    }
})

It doesn't matter if the parameter is first copied to TableName or used directly, it only seems to support the TableName property being a string literal (['string value'] also fails).

This essentially prevents use of an API such as batchWriteItem where the properties are table names, and thus need to be passed in as properties.

Error is (note the lack of context):

    Error: unable to extract property name for property assignment

    Kind: ObjectLiteralExpression
    Source: ??