See this example:
https://typescripttolua.github.io/play/#code/FAFwngDgpgBAQgJwIYDsAmU0B4AqA+GAXhhxgDIYBvAfQCNl0AuGVMAX2GAGMB7FAZxAwAtmABiAVxRciMABRyAlITyU2ilv3gMM2JSoBuPAJZo8wUZOkA6LkgA29uQAYNAejcwoAD2hcQmDA8EiAQIcyWUlwuipzAHjAgABZQ-LAA7jwIANYANDBJPOlQBlAIoJCwiKi6AIy4BMSknLwCQpHStbIKyqrqmto1mPX6eEam5h1ctbYOTq5xrYIi4lEATN2jahpIWj2GJmjkVHQ6zKzqFqvSa7OOMUA

I would expect myFunc(0) in the output, not myFunc.call(0)

This doesn't happen if the brand type is removed, or "inlining" the type alias