{"ast_node_type":"variable","tokens":[{"end":46,"kind":"keyword","start":0,"text":"let"}]}
        let decl = self.origin.declaration()?;
    pub fn declaration_source_range(&self, db: &dyn DefDatabase) -> Option<InFile<TextRange>> {
        Some(InFile { file_id: decl.file_id, value: decl.to_range(db) })