OptionalinputThe text's format (default "bitmark"): "json", "jsonl" and the
markup formats are read in entries too (PLAN-271 D8); "auto" reads the
text once, at creation.
OptionalpositionUnits for every position in and out — changes, edits, spans, anchors,
tokens, diagnostics. Default "utf-16".
OptionalversionLSP-style document version. Default: 0.
Options for createDocument.