pub trait MigrationOperationExt {
// Required methods
fn old_db_path(&self, chain_data_path: &Path) -> PathBuf;
fn new_db_path(&self, chain_data_path: &Path) -> PathBuf;
fn temporary_db_name(&self) -> String;
fn temporary_db_path(&self, chain_data_path: &Path) -> PathBuf;
}