invoke
operator fun String.invoke(config: MatrixSuiteConfigBuilder, body: suspend <Error class: unknown class>.(T) -> Unit)
operator fun String.invoke(testConfig: <Error class: unknown class> = TestConfig, body: suspend <Error class: unknown class>.(T) -> Unit)
operator fun String.invoke(testConfig: <Error class: unknown class> = TestConfig): MatrixFixtureConfiguredSuite<T>
testConfig is for aroundAll / aroundEach / context / timeouts only. Set concurrency via execution (the matrixConfig overload), not TestConfig.invocation(...); testScope(...) is sequential-only.