Yeah, it was wrong, I'm currently using like ```js let ret = { ... ( couldBeNull ? {couldBeNull} : {} ) } ```
Yours is better and the usual idiom a bit hard to understand. What I'm proposing is something like this ```js let ret = { couldBeNull? } ``` or if you want a different name for the property ```js let ret = { bar ?: couldBeNull } ``` It is not like there is no way to do this, there are plenty. But this way could make code a bit easier to read.
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