The import with mapping action, makes it possible to map a string value to an entity structure following a certain schema.
There is an error when the string is not valid according the schema. However, the validation stops validating when there is an error. Hence, only the first error (following the schema) is available in $latestError/Message.
A validation of the entire request will prevent trail&error requests. Therefore, MxMakers want to be able to validate the ENTIRE string with the selected schema.
If you need it, we need it.