JsonValue
JsonValue =
null|boolean|number|string|JsonValue[] | {[key:string]:JsonValue; }
Defined in: js-api/src/u2core/protocol.ts:55
JSON-safe projection of a value — what crosses page.evaluate. Dates become ISO strings,
entities/objects with a name become that name, arrays map element-wise, plain objects key-wise,
functions/elements become undefined, everything else String(x). Produced by Control.jsonValue.