JWSHeader: 'set' is inaccessible due to 'internal' protection level

[piotrczurak]

JWSHeader is declared public, but it implements an internal JOSEHeader protocol. set is declared as a public method in JOSEHeader extension, but ultimately it is unavailable outside the project, being restricted by JOSEHeader internal access level.
Tests pass because @Testable effectively makes turns internal into public.

[jking-bit]

Similar issue here. Both get(parameter parameterName: String) and set(_ value: Any, forParameter parameterName: String) give a is inaccessible due to 'internal' protection level.
@piotrczurak's suggestion to pass JOSEHeader public might be the solution