### Question:
TypeDeclaration { public List<TypeParameterDeclaration> getTypeParameterDeclarations() { Optional<List<TypeParameterDeclaration>> typeParameterDeclarations = typeParameterDeclarationsMap.values().stream().findFirst(); return typeParameterDeclarations.orElse(Collections.emptyList()); } protected  TypeDeclaration(
      Context ctx,
      TypeMirror type,
      CtType ctType,
      TypeElement typeElement,
      Map<Name, List<TypeParameterDeclaration>> typeParameterDeclarationsMap); TypeMirror getType(); String getBinaryName(); boolean isUnknownType(); boolean isNullType(); boolean isBooleanType(); boolean isTextType(); boolean isNumberType(); boolean is(Class<?> clazz); boolean isScalarType(); boolean isScalarIterableType(); boolean isScalarArrayType(); List<TypeParameterDeclaration> getTypeParameterDeclarations(); Optional<ConstructorDeclaration> getConstructorDeclaration(
      List<TypeDeclaration> parameterTypeDeclarations); Optional<FieldDeclaration> getFieldDeclaration(String name); Optional<FieldDeclaration> getStaticFieldDeclaration(String name); Optional<MethodDeclaration> getMethodDeclaration(
      String name, List<TypeDeclaration> parameterTypeDeclarations); Optional<MethodDeclaration> getStaticMethodDeclaration(
      String name, List<TypeDeclaration> parameterTypeDeclarations); TypeDeclaration emulateConcatOperation(TypeDeclaration other); TypeDeclaration emulateArithmeticOperation(TypeDeclaration other); boolean isSameType(TypeDeclaration other); @Override String toString();  }### Answer:
@Test void getTypeParameterDeclarations() { Class<?> testClass = getClass(); addProcessor( new TestProcessor() { @Override protected void run() { TypeDeclaration typeDeclaration = ctx.getDeclarations().newTypeDeclaration(String.class); List<TypeParameterDeclaration> typeParams = typeDeclaration.getTypeParameterDeclarations(); assertTrue(typeParams.isEmpty()); } }, new TestProcessor() { @Override protected void run() { TypeDeclaration typeDeclaration = ctx.getDeclarations().newTypeDeclaration(testClass); Optional<FieldDeclaration> field = typeDeclaration.getFieldDeclaration("myFunctionField"); assertNotNull(field); assertTrue(field.isPresent()); List<TypeParameterDeclaration> typeParams = field.get().getTypeDeclaration().getTypeParameterDeclarations(); assertEquals(2, typeParams.size()); TypeParameterDeclaration typeParam1 = typeParams.get(0); TypeVariable typeVariable1 = ctx.getMoreTypes().toTypeVariable(typeParam1.getFormalType()); assertEquals("T", typeVariable1.asElement().getSimpleName().toString()); assertTrue( ctx.getMoreTypes().isSameTypeWithErasure(typeParam1.getActualType(), String.class)); TypeParameterDeclaration typeParam2 = typeParams.get(1); TypeVariable typeVariable2 = ctx.getMoreTypes().toTypeVariable(typeParam2.getFormalType()); assertEquals("R", typeVariable2.asElement().getSimpleName().toString()); assertTrue( ctx.getMoreTypes() .isSameTypeWithErasure(typeParam2.getActualType(), Integer.class)); } }); }