@Nullable
    static RequestTarget forClient(String reqTarget, @Nullable String prefix) {
        return DefaultRequestTarget.forClient(reqTarget, prefix);
    }
Returns a {@link RequestTarget} parsed and normalized from the specified request target string
in the context of client-side application. It rejects an authority form request target.

@param reqTarget the request target string
@param prefix the prefix to add to {@code reqTarget}. No prefix is added if {@code null} or empty.
@return a {@link RequestTarget} if parsed and normalized successfully, or {@code null} otherwise.
@see #forServer(String)
core/src/main/java/com/linecorp/armeria/common/RequestTarget.java