Pillow plugin: not proper mimetype get registered

[bigcat88]

def register_heif_opener():
    ...
    Image.register_mime(HeifImageFile.format, "image/heic")
    Image.register_mime(HeifImageFile.format, "image/heic-sequence")
    Image.register_mime(HeifImageFile.format, "image/heif")
    Image.register_mime(HeifImageFile.format, "image/heif-sequence")
    ...

In the end format HEIF has registered mimetype to image/heif-sequence

The main question, what mimetype choose for HEIF format: image/heic or image/heif ?
We can choose only one...