{"action":"created","comment":{"url":"https://api.github.com/repos/broadinstitute/hellbender/pulls/comments/39885713","id":39885713,"diff_hunk":"@@ -0,0 +1,382 @@\n+package org.broadinstitute.hellbender.engine.dataflow.datasources;\n+\n+import com.google.api.services.storage.Storage;\n+import com.google.cloud.dataflow.sdk.Pipeline;\n+import com.google.cloud.dataflow.sdk.runners.DataflowPipeline;\n+import com.google.cloud.dataflow.sdk.transforms.Create;\n+import com.google.cloud.dataflow.sdk.transforms.ParDo;\n+import com.google.cloud.dataflow.sdk.values.KV;\n+import com.google.cloud.dataflow.sdk.values.PCollection;\n+import com.google.cloud.genomics.dataflow.readers.bam.BAMIO;\n+import com.google.cloud.genomics.dataflow.utils.GCSOptions;\n+import com.google.cloud.genomics.utils.GenomicsFactory;\n+import com.google.common.base.Stopwatch;\n+import htsjdk.samtools.SAMRecord;\n+import htsjdk.samtools.SAMRecordIterator;\n+import htsjdk.samtools.SamReader;\n+import htsjdk.samtools.ValidationStringency;\n+import htsjdk.samtools.util.Locatable;\n+import org.apache.logging.log4j.LogManager;\n+import org.apache.logging.log4j.Logger;\n+import org.broadinstitute.hellbender.engine.ReadsDataSource;\n+import org.broadinstitute.hellbender.engine.dataflow.DoFnWLog;\n+import org.broadinstitute.hellbender.utils.SimpleInterval;\n+import org.broadinstitute.hellbender.utils.dataflow.BucketUtils;\n+import org.broadinstitute.hellbender.utils.read.GATKRead;\n+import org.broadinstitute.hellbender.utils.read.SAMRecordToGATKReadAdapter;\n+\n+import java.io.File;\n+import java.time.Duration;\n+import java.time.Instant;\n+import java.util.ArrayList;\n+import java.util.Collections;\n+import java.util.Date;\n+import java.util.HashMap;\n+import java.util.Iterator;\n+import java.util.List;\n+import java.util.concurrent.TimeUnit;\n+import java.util.stream.Collectors;\n+\n+/**\n+ * see ShardedReadsDatasource.get\n+ */\n+public final class ShardedReadsDatasource 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