pub fn merge_multiple_new_table_watermarks(
table_watermarks_list: impl IntoIterator<Item = HashMap<TableId, TableWatermarks>>,
) -> HashMap<TableId, TableWatermarks>
pub fn merge_multiple_new_table_watermarks(
table_watermarks_list: impl IntoIterator<Item = HashMap<TableId, TableWatermarks>>,
) -> HashMap<TableId, TableWatermarks>