@Override
  public Collection<ErrorDetail> getErrors() {
    return ImmutableList.copyOf(errors.values());
  }
A {@link IdempotentImportExecutor} that stores known values in memory.
portability-spi-transfer/src/main/java/org/datatransferproject/spi/transfer/idempotentexecutor/RetryingInMemoryIdempotentImportExecutor.java