Requested context value type.
Optional Readonly byRequest method.
Specifies how to obtain the value. E.g. it can be used to request only default one.
Optional Readonly orA fallback value to use if there is no value available for requested entry.
Can be null. undefined means there is no fallback.
Optional setAssigns the value.
When specified, this method is called right before returning the value from get call. It won't be called if there is no value to return.
The value or default value assigned to entry, or a fallback one.
The request method the value is obtained by.
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Context value request.
This can be passed to get method as second parameter.