in src/main/java/com/spotify/sparkey/ReadOnlyMemMap.java [98:109]
private ReadOnlyMemMap(ReadOnlyMemMap source, MappedByteBuffer[] chunks) {
this.source = source;
this.file = source.file;
this.allInstances = source.allInstances;
this.randomAccessFile = source.randomAccessFile;
this.size = source.size;
this.numChunks = source.numChunks;
this.chunks = chunks;
curChunkIndex = 0;
curChunk = chunks[0];
curChunk.position(0);
}