pub fn extract_relations(
old_table: Option<&ParsedTable>,
new_table: &ParsedTable,
all_tables: &[ParsedTable],
) -> (Vec<MigrationStep>, Vec<ParsedTable>)pub fn extract_relations(
old_table: Option<&ParsedTable>,
new_table: &ParsedTable,
all_tables: &[ParsedTable],
) -> (Vec<MigrationStep>, Vec<ParsedTable>)