presto-spi/src/main/java/io/prestosql/spi/connector/FixedSplitSource.java/FixedSplitSource/FixedSplitSource
class FixedSplitSource:    public FixedSplitSource(Iterable<? extends ConnectorSplit> splits)
    {
        requireNonNull(splits, "splits is null");
        List<ConnectorSplit> splitsList = new ArrayList<>();
        for (ConnectorSplit split : splits) {
            splitsList.add(split);
        }
        this.splits = Collections.unmodifiableList(splitsList);
    }