Accept array of block names in registerBlockStyle

[cbirdsong]

What problem does this address?

When registering block styles using wp.blocks.registerBlockStyle, I often want to add the same block style to multiple similar blocks that might need to have the same appearance, and I end up doing something like this:

var heading_blocks = ["core/heading", "core/paragraph", "core/post-title"]; // depending on the site this might also include comments title, search title, etc
heading_blocks.forEach((block) => {
  wp.blocks.registerBlockStyle(block, [
    {
      name: "subhead",
      label: "Subhead",
    },
    {
      name: "lead",
      label: "Lead",
    }
  ]);
});

var container_blocks = ["core/group", "core/column", "core/quote"];
container_blocks.forEach((block) => {
  wp.blocks.registerBlockStyle(block, [
    {
      name: "bordered-shadowed",
      label: "Bordered / Shadowed",
    }
  ]);
});

This is obviously easy enough, but it makes switching from registering a single block style to multiple block styles slightly awkward.

What is your proposed solution?

Accept either a single block name or an array of block names when calling wp.blocks.registerBlockStyle.

[Mamaduka]

I've seen similar requests for the core registration methods in the past, and the argument against them always was that they're easy to implement on the project level.