Addition to JSON config file

General
1

If I were to use Orthanc’s JSON file and add a new element to that file, would Orthanc reject the file (it contains an element that Orthanc doesn’t recognise) or simple ignore it?

(I appreciate that I can add the element in with an underscore to make it like a comment)

ie:

"Name" : "orthanc",
"StorageDirectory" : "/var/lib/orthanc/db-v6",
...
"MyNewKey" : "MyValue",      <------------- new value here
...
"HttpPort" : 8042,
2

In this case, Orthanc accept the configuration file and ignore the tag.