This site describes solve-engine as it is on main: 2.43.0, which npm does not have yet. npm installs 2.40.0, so a page may show an answer that version does not give yet.
LineResults
type LineResults = | ParsingResult | ((line) => Value | null | undefined);Defined in: packages/engine/src/language/DocumentReferences.ts:132
A document’s evaluated results, for a hover to read a value from: the result
of parseDocument/evaluateDocument, or a function from a one-based line
number to that line’s value.