proc contains(tree: JsonTree; path: JsonPtr): bool {.inline,
    ...raises: [UsageError, SyntaxError], tags: [], forbids: [].}

proc dump(tree: JsonTree; path: JsonPtr): string {.
    ...raises: [UsageError, SyntaxError, PathError], tags: [], forbids: [].}

proc extract(tree: JsonTree; path: JsonPtr): JsonTree {.
    ...raises: [UsageError, SyntaxError, PathError], tags: [], forbids: [].}

proc kind(tree: JsonTree; path: JsonPtr): JsonNodeKind {.inline,
    ...raises: [UsageError, SyntaxError, PathError], tags: [], forbids: [].}

proc len(tree: JsonTree; path: JsonPtr): int {.
    ...raises: [UsageError, SyntaxError, PathError], tags: [], forbids: [].}