How to preserve the initial style?

[Fanyini]

Dear all,
Firstly, thanks again for the nice work! I am also really grateful for support and implementing features based on requests from people!
Below is my code，I want the initial protein structure to be presented in the "molecular-surface" form. Next, other protein structures are added to manifest themselves in the form of "spacefills".But it will all be updated to the "spacefill" form (including the initial protein structure).
` new Promise((resolve => {
viewerInstance = new PDBeMolstarPlugin();
viewerContainer = document.getElementById("pdbView");

    // console.log(resolve)
    resolve()
})).then(() => {
    optionBall = {
        customData: {
            url: "http://127.0.0.1:5000/molStar/frameIndex", format: "pdb",
        }, visualStyle: "molecular-surface",
        hideControls: true,
    }
}).then(() => {
    viewerInstance.render(viewerContainer, optionBall)
}).then(() => {
    setTimeout(() => {
        viewerInstance.visual.update({
            customData: {
                url: "http://127.0.0.1:5000/molStar/pocketIndex",
                format: 'pdb',
            },
            visualStyle: "spacefill",
        }, false)
    }, 2000)
})`

[mandarsd]

This feature is now implemented / available in recent v3.x