FunctionAnnotation interface
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To resolve a FunctionAnnotation, an externally defined function is called.
Signature:
export interface FunctionAnnotation
Remarks
The name identifies a function that takes in the arguments args, the current locale, as well as any options, and returns some corresponding output. Likely functions available by default would include 'plural' for determining the plural category of a numeric value, as well as 'number' and 'date' for formatting values.