For portable-text, each endpoint pairs the _key of a Portable Text
block with a character offset into that block's plain text. An optional
fieldValue is Portable Text covering the anchor. When set, the selection
is resolved from those blocks instead of from the live document.
Where in
patha comment is anchored.For
portable-text, each endpoint pairs the_keyof a Portable Text block with a character offset into that block's plain text. An optionalfieldValueis Portable Text covering the anchor. When set, the selection is resolved from those blocks instead of from the live document.