Why this function is async?

[nayounsang]

// src/core/embedders/PngEmbedder.ts#11
  static async for(imageData: Uint8Array) {
    const png = PNG.load(imageData);
    return new PngEmbedder(png);
  }

PNG.load is just sync function that assigns RGB channel or size or ...(png meta data).
After load the png, this is just factory pattern code.
I haven't checked whether other embeddings are async as well.
I think this introduces overheads very slightly, but It can be confusing when trying to figure out the inner workings and flow.