Polymorphic this (TS 1.7)

[tomlarkworthy]

is not accepted as valid TS. See microsoft/TypeScript#4910

[bpasero]

Tom Larkworthy (@tomlarkworthy) for this to work you will need to set the typescript.tsdk property (in preferences) to a 1.7 TS version. Are you doing that?

[tomlarkworthy]

No I was not! Thanks, it all works!

[bpasero]

Great