arrow-core-data / arrow.core / Option / reduceRightEvalOrNull
inline fun <B> reduceRightEvalOrNull(initial: (A) -> B, operation: (A, acc: Eval<B>) -> Eval<B>): Eval<B?>
inline fun <B> reduceRightEvalOrNull(initial: (A) -> B, operation: (A, acc:
Eval
<B>) ->
<B>):
<B?>
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