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kvision
kvision-state
/
io.kvision.state
/
sub
sub
fun
<
S
,
T
>
ObservableState
<
S
>
.
sub
(
contextWidget
:
Widget
?
=
null
,
extractor
:
(
S
)
->
T
)
:
ObservableState
<
T
>
(
source
)
Returns a sub-store of the original ObservableState
Parameters
extractor
an extractor function