Metadata injection support is currently available in Java, for example ' https://github.com/pact-foundation/pact-plugins/blob/main/examples/gRPC/metadata/provider-jvm/server/src/test/java/io/pact/example/grpc/provider/PactVerificationTest.java#L60 ' . This function is needed in cases such as providing an authentication token to be able to verify the contract file using "verifyProvider" if the producer service is performing token authorization.
