chainIn (method)
chain
In
chain
In
<
U
,
R
>
(
this
,
f
)
:
Opt
<
R
[]
>
Type Parameters
U
R
Parameters
this
:
Opt
<
U
[]
>
f
:
(
(
x
)
=>
R
[]
)
(
x
)
:
R
[]
Parameters
x
:
U
Returns
R
[]
Returns
Opt
<
R
[]
>
Alias
Opt.flatMapIn
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Alias
Opt.flatMapIn