@Override
    public boolean isAcquirable(KeepAliveHandler keepAliveHandler) {
        final Boolean isAcquirable = this.isAcquirable;
        if (isAcquirable == null || !isAcquirable) {
            return false;
        }
        return !keepAliveHandler.needsDisconnection();
    }
{@code true} if an {@link Http2Settings} has been received from the remote endpoint.
core/src/main/java/com/linecorp/armeria/client/HttpSessionHandler.java