PositionArea:
| "block-end"
| "block-start"
| "bottom"
| "center"
| "end"
| "inline-end"
| "inline-start"
| "left"
| "right"
| "self-block-end"
| "self-block-start"
| "self-end"
| "self-inline-end"
| "self-inline-start"
| "self-start"
| "span-all"
| "span-block-end"
| "span-block-start"
| "span-bottom"
| "span-end"
| "span-inline-end"
| "span-inline-start"
| "span-left"
| "span-right"
| "span-self-block-end"
| "span-self-block-start"
| "span-self-end"
| "span-self-inline-end"
| "span-self-inline-start"
| "span-self-start"
| "span-start"
| "span-top"
| "span-x-end"
| "span-x-self-end"
| "span-x-self-start"
| "span-x-start"
| "span-y-end"
| "span-y-self-end"
| "span-y-self-start"
| "span-y-start"
| "start"
| "top"
| "x-end"
| "x-self-end"
| "x-self-start"
| "x-start"
| "y-end"
| "y-self-end"
| "y-self-start"
| "y-start"
| string & {}