Function inlay_hints_resolve 

pub(crate) fn inlay_hints_resolve(
    db: &RootDatabase,
    file_id: FileId,
    resolve_range: TextRange,
    hash: u64,
    config: &InlayHintsConfig<'_>,
    hasher: impl Fn(&InlayHint) -> u64,
) -> Option<InlayHint>