diff --git a/python/openapi/src/com/jetbrains/python/Result.kt b/python/openapi/src/com/jetbrains/python/Result.kt
index bd84937b508a..9190f0aec86e 100644
--- a/python/openapi/src/com/jetbrains/python/Result.kt
+++ b/python/openapi/src/com/jetbrains/python/Result.kt
@@ -186,3 +186,9 @@ val <S, E> Result<S, E>.isFailure: Boolean get() = this is Failure
 val <S, E> Result<S, E>.isSuccess: Boolean get() = this is Success
 fun <S, E> Result<S, E>.getOrThrow(): S = orThrow()
 
+
+/**
+ * See [Result.mapSuccess]
+ */
+inline fun <S, E, E2> Iterable<Result<S, E>>.mapError(code: (E) -> E2): List<Result<S, E2>> =
+  map { it.mapError(code) }