Both source and target of the update can be provided by passing a
XUpdatableLayer object. Alternatively they can be
provided individually by providing a XLayer object as
data source and an XLayerHandler object to receive the
updated data.
Implementations can provide more arguments to finetune the behavior.
Such arguments are provided as
::com::sun::star::beans::NamedValue.
Implementations should support the following named arguments:
Overwrite : boolean
If false, specifies that changes should be applied
only if the existing layer is empty.
Truncate : boolean
If true requests that changes should not be merged onto
existing data, but that the changes should be applied
to a layer that is completely empty.
