public ClientFactoryBuilder http2InitialStreamWindowSize(int http2InitialStreamWindowSize) {
        checkArgument(http2InitialStreamWindowSize > 0,
                      "http2InitialStreamWindowSize: %s (expected: > 0 and <= %s)",
                      http2InitialStreamWindowSize, MAX_INITIAL_WINDOW_SIZE);
        option(ClientFactoryOptions.HTTP2_INITIAL_STREAM_WINDOW_SIZE, http2InitialStreamWindowSize);
        return this;
    }
Sets the
<a href="https://datatracker.ietf.org/doc/html/rfc7540#section-6.5.2">SETTINGS_INITIAL_WINDOW_SIZE</a>
for HTTP/2 stream-level flow control. Note that this setting affects the window size of all streams,
not the connection-level window size.

@see #http2InitialConnectionWindowSize(int)
core/src/main/java/com/linecorp/armeria/client/ClientFactoryBuilder.java