### Question:
PluginForMongo implements Uml2XsdPlugin { @Override public Map<String, String> declarePrefixMappings() { final Map<String, String> pms = new HashMap<String, String>(); pms.put("sli", SliMongoConstants.NAMESPACE_SLI); return Collections.unmodifiableMap(pms); }  static final boolean isUnbounded(final Occurs occurs); @Override Map<String, String> declarePrefixMappings(); @Override QName getElementName(final String name, final boolean isReference); @Override QName getElementType(final String name, final boolean isAssociation); @Override QName getGraphAssociationEndName(final PsmDocument<Type> classType); @Override QName getElementName(final PsmDocument<Type> classType); @Override String getTargetNamespace(); @Override QName getTypeName(final String name); @Override boolean isAttributeFormDefaultQualified(); @Override boolean isElementFormDefaultQualified(); @Override boolean isEnabled(final QName name); @Override void writeAppInfo(final TaggedValue taggedValue, final ModelIndex lookup, final Uml2XsdPluginWriter xsw); @Override void writeAssociation(final ClassType complexType, final AssociationEnd end, final ModelIndex model,
            final Uml2XsdPluginWriter xsw); @Override void writeTopLevelElement(PsmDocument<Type> classType, ModelIndex model, Uml2XsdPluginWriter xsw);  }### Answer:
@Test public void testDeclarePrefixMappings() throws Exception { final Map<String, String> prefixMappings = pluginForMongo.declarePrefixMappings(); Assert.assertTrue(prefixMappings.containsKey("sli")); }