### Question:
VariantSimulator { public Variant simulate() { return _create(DEFAULT_NUM_SAMPLES, variantSimulatorConfiguration.getRegions()); } VariantSimulator();  VariantSimulator(VariantSimulatorConfiguration variantSimulatorConfiguration); Variant simulate(); List<Variant> simulate(int numVariants); List<Variant> simulate(int numVariants, int numSamples, List<Region> regions); String createRandomChromosome(List<Region> regions); String genId(); String[] createIndelAlleles(); String getVariantType(); List<StudyEntry> getStudies(int n); List<String> getFormat(); Map<String, String> genFileData(); static final int DEFAULT_NUM_SAMPLES; static final String[] ALLELE_BASES; }### Answer:
@Test public void testSimulate() throws Exception { VariantSimulatorConfiguration variantSimulatorConfiguration = new VariantSimulatorConfiguration(); VariantSimulator variantSimulator = new VariantSimulator(variantSimulatorConfiguration); Variant variant = variantSimulator.simulate(); System.out.println(variant.toJson()); }