Values.CopyValueEntrySourceThis object defines one value to be copied with the copyValue processor.
type nonrec t = {source : Source.t;The key to copy.
*)target : Target.t;The key of the field to copy the value to.
*)overwriteIfExists : OverwriteIfExists.t option;Specifies whether to overwrite the value if the destination key already exists. If you omit this, the default is false.
*)}val to_value :
t ->
[> `Structure of
(string * [> `Boolean of OverwriteIfExists.t | `String of Source.t ])
list ]