public Handle rollbackToSavepoint(String savepointName) {
        final long start = System.nanoTime();
        transactionHandler.rollbackToSavepoint(this, savepointName);
        LOG.trace("Handle [{}] rollback to savepoint \"{}\" in {}ms", this, savepointName, msSince(start));
        return this;
    }
Rollback a transaction to a named savepoint.

@param savepointName the name of the savepoint, previously declared with {@link Handle#savepoint}.
@return the same handle.
core/src/main/java/org/jdbi/v3/core/Handle.java