Node reference validation

Hello, 

Today if we reference a node in a data model instance to create a relationship between two nodes, the referenced node existance is not validated at insertion level. In order to enforce data quality, do you envision to add a “strict mode” at the DMS level that checks for referenced node existence before creating the reference?   

i.e:

Running this query results in a successful transformation run

select
    'test' as externalId,
    'test' as space,
    node_reference('space', 'external_id_that_does_not_exist') as Child,
  from
    staging_table

Thanks!