{"ast_node_type":"function","tokens":[{"end":82,"kind":"keyword","start":0,"text":"pub"}]}
    pub fn monotonic_expander<'b>(&'b mut self) -> expand::MacroExpander<'b, 'a> {
    /// Once `NodeId`s are assigned, the node may not be expanded, removed, or otherwise modified.
        expand::MacroExpander::new(self, true)