'next' for the parent for loop within a function -- possible?

[pathos]

for (...) {
  df = custom_function(...)
}

Let's say there was some condition within the custom_function. If that condition is met, how can I make the go on the next iteration of this for loop? It seems that I cannot just run next inside the function.

I saw this answer: breaking out of for loop when running a function inside a for loop in R - Stack Overflow

However, the constraint is that the function should not return NULL, NA, or something similar.

[pe2ju]

Can you provide minimal reproducible codes?