public static <T> T newClient(Scheme scheme, EndpointGroup endpointGroup, Class<T> clientType) {
        return builder(scheme, endpointGroup).build(clientType);
    }
Creates a new gRPC client that connects to the specified {@link EndpointGroup} with the specified
{@link Scheme} using the default {@link ClientFactory}.

<p>Note that if a {@link SerializationFormat} is not specified in the {@link Scheme} component of
the {@link URI}, {@link GrpcSerializationFormats#PROTO} will be used by default.

@param scheme the {@link Scheme}
@param endpointGroup the server {@link EndpointGroup}
@param clientType the type of the new gRPC client

@throws IllegalArgumentException if the specified {@code clientType} is unsupported for
                                 the specified {@link Scheme}.
grpc/src/main/java/com/linecorp/armeria/client/grpc/GrpcClients.java