julian on Nostr: Let's say for some contrived (but very real) reason, I want to add { "toot": ...

Let's say for some contrived (but very real) reason, I want to add { "toot": "http://joinmastodon.org/ns#";, "Emoji": "toot:Emoji" } to @context, but another member of @context might be { "toot": "http://joinmastodon.org/ns#";, "focalPoint": ... }
Would it be acceptable if I just pushed my object to the end and assumed that JSON-LD parsers would correctly reduce it down to:
{
"toot": "http://joinmastodon.org/ns#";,
"Emoji": "toot:Emoji",
"focalPoint": ...
}

... or should I be adding in logic to detect the existing member defining toot and merge the Emoji property in?