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arrow-core
/
arrow.core
/
fold
fold
inline
fun
<
K
,
A
,
B
>
Map
<
K
,
A
>
.
fold
(
initial
:
B
,
operation
:
(
acc
:
B
,
Map.Entry
<
K
,
A
>
)
->
B
)
:
B