test_class.file: server/src/test/java/io/spine/server/type/EmptyClassTest.java
test_class.identifier: EmptyClassTest
test_case.body: @Test
      @DisplayName("return the same instance")
      void sameInstance() {
          assertSame(EmptyClass.instance(), EmptyClass.instance());
      }
test_case.class_method_signature: EmptyClassTest.sameInstance()
test_case.full_signature: @Test @DisplayName("return the same instance") void sameInstance()
test_case.identifier: sameInstance
test_case.invocations: assertSame instance instance
test_case.modifiers: @Test @DisplayName("return the same instance")
test_case.parameters: ()
test_case.return: void
test_case.signature: void sameInstance()
focal_class.declarator: serialVersionUID = 0L
focal_class.modifier: private static final
focal_class.original_string: private static final long serialVersionUID = 0L;
focal_class.type: long
focal_class.var_name: serialVersionUID
focal_class.declarator: INSTANCE = new EmptyClass()
focal_class.modifier: private static final
focal_class.original_string: private static final EmptyClass INSTANCE = new EmptyClass();
focal_class.type: EmptyClass
focal_class.var_name: INSTANCE
focal_class.file: server/src/main/java/io/spine/server/type/EmptyClass.java
focal_class.identifier: EmptyClass
focal_class.class_method_signature: EmptyClass.EmptyClass()
focal_class.full_signature: private  EmptyClass()
focal_class.identifier: EmptyClass
focal_class.modifiers: private
focal_class.parameters: ()
focal_class.signature:  EmptyClass()
focal_class.class_method_signature: EmptyClass.instance()
focal_class.full_signature: public static EmptyClass instance()
focal_class.identifier: instance
focal_class.modifiers: public static
focal_class.parameters: ()
focal_class.return: EmptyClass
focal_class.signature: EmptyClass instance()
focal_class.class_method_signature: EmptyClass.toString()
focal_class.full_signature: @Override public String toString()
focal_class.identifier: toString
focal_class.modifiers: @Override public
focal_class.parameters: ()
focal_class.return: String
focal_class.signature: String toString()
focal_class.class_method_signature: EmptyClass.readResolve()
focal_class.full_signature: private Object readResolve()
focal_class.identifier: readResolve
focal_class.modifiers: private
focal_class.parameters: ()
focal_class.return: Object
focal_class.signature: Object readResolve()
focal_class.superclass: extends MessageClass<Empty>
focal_method.body: public static EmptyClass instance() {
          return INSTANCE;
      }
focal_method.class_method_signature: EmptyClass.instance()
focal_method.full_signature: public static EmptyClass instance()
focal_method.identifier: instance
focal_method.modifiers: public static
focal_method.parameters: ()
focal_method.return: EmptyClass
focal_method.signature: EmptyClass instance()