### Question:
DMNImportTypesHelperImpl implements DMNImportTypesHelper { @Override public boolean isDMN(final Path path) { return matchesExtension(path, DMNImportTypes.DMN); }  @Override boolean isDMN(final Path path); @Override boolean isPMML(final Path path); @Override boolean isJava(final Path path);  }### Answer:
@Test public void testIsDMN() { assertThat(helper.isDMN(dmnPath)).isTrue(); assertThat(helper.isDMN(pmmlPath)).isFalse(); assertThat(helper.isDMN(javaPath)).isFalse(); }