.setReferenceDictionary(sequenceDictionary);
if (CREATE_INDEX)
builder.setOption(Options.INDEX_ON_THE_FLY);
else
builder.unsetOption(Options.INDEX_ON_THE_FLY);
final VariantContextWriter writer = builder.build();
final VCFHeader header = new VCFHeader(inputVcfHeader.getMetaDataInInputOrder(), SAMPLE);
writer.writeHeader(header);
// Go through the input, strip the records and write them to the output