Method ColumnLines

tools/shell/shell_render_table_metadata.cpp:91–93

	}

	idx_t ColumnLines() const {
		return column_renders[0].columns.size();
	}

	void Truncate(idx_t max_render_width);
	static void TruncateValueIfRequired(string &value, idx_t &render_length, idx_t max_render_width);