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

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

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