{"ast_node_type":"variable","tokens":[{"end":91,"kind":"keyword","start":0,"text":"let"}]}
    let trimmed_selected_range = trimmed_text_range(&source_file, ctx.selection_trimmed());
    // Enable this assist if the user select all "meaningful" content in the source file
    let trimmed_file_range = trimmed_text_range(&source_file, source_file.syntax().text_range());