This method retrieves Purchases from the system based on a set of criteria.
A list of purchases meeting the specified criteria.
| || ||The customerCode of the purchase to filter on.|
| || ||Whether or not to include unmapped purchases.|
| || ||The productLabel of the puchase to filter on.|
| || ||Select only purchases with a purchaseDate later than dateFrom. This should be in the format |
| || ||Select only purchases with a purchaseDate earlier than dateTo. This should be in the format |
| || ||Additional information when operation failed.|
| || ||Whether the operation completed successfully.|
| || ||Operation result.|