validator.validate has type void

[endro42]

Expected behavior

In the docs under section creating transactions transactionErrors should be typed so that length and the spread operation is available with Typescript

Actual behavior

Steps to reproduce

Create a local project with Typescript and import the code given in the Lisk docs

Which version(s) does this affect? (Environment, OS, etc...)

[shuse2]

This is problem in the documentation than Lisk SDK.
the new usage should be

validator.validate<SomeExpectedType>(schema, object)

and if it does not match the schema, it will throw. and the object will be typed as SomeExpectedType after this call