Uses custom operation definition to fill fields of SubmissionEntry.
Can be used in cases, when builtin prep* functions aren't enough.
Custom definition fields must correspond to fields of SubmissionEntry for this to work.
Note: This doesn't touch previous state of the entry, just fills the corresponding fields.
So it might be needed to call clear first on the entry (depends on usage).
Uses custom operation definition to fill fields of SubmissionEntry. Can be used in cases, when builtin prep* functions aren't enough.
Custom definition fields must correspond to fields of SubmissionEntry for this to work.
Note: This doesn't touch previous state of the entry, just fills the corresponding fields. So it might be needed to call clear first on the entry (depends on usage).