Retrieves a log forecast model contribution

Fiscal year start specifies the fiscal year start month to aggregate values. The default start month is January.

When set to true, this will change values to Period over Period lift basis for CCR calculation. The default is false.

When parameter value passed is 'true', this will return the forecast series with the model transformation. When parameter value passed is 'false' or no parameter value is passed, raw values are returned.