}

    @Override
    public boolean isIncremental() {
        return taskExecutionDetails.isIncremental();
    }

    @Override
    @Nullable
    public List<String> getExecutionReasons() {
        return taskExecutionDetails.getExecutionReasons();
    }

        }

        @Override
        public List<String> getExecutionReasons() {
            throw Exceptions.unsupportedMethod(TaskExecutionResult.class.getSimpleName() + ".getExecutionReasons()");
        }
    };

    abstract boolean isIncremental();

    @Nullable
    abstract List<String> getExecutionReasons();

    }

    @Override
    public boolean isIncremental() {
        return taskExecutionDetails.isIncremental();
    }

    @Override
    @Nullable
    public List<String> getExecutionReasons() {
        return taskExecutionDetails.getExecutionReasons();
    }

        this.reusedOutputOriginMetadata = reusedOutputOriginMetadata;
    }

    protected UpToDateResult(UpToDateResult parent) {
        super(parent);
        this.executionReasons = parent.getExecutionReasons();
        this.reusedOutputOriginMetadata = parent.getReusedOutputOriginMetadata().orElse(null);
    }

    /**

                    .getOrMapFailure(throwable -> false);
            }

            @Override
            public List<String> getExecutionReasons() {
                return result.getExecutionReasons();
            }

            @Override
            public CachingState getCachingState() {
                return result.getCachingState();
            }
        };

    /**
     * Returns the reasons for executing this task.
     *
     * @return the list of reasons; {@code null} if undetermined (e.g. if the task was skipped).
     */
    List<String> getExecutionReasons();

                        result.getExecution(),
                        result.getCachingState(),
                        result.getReusedOutputOriginMetadata(),
                        result.getExecutionReasons()
                    );
                    operationContext.setResult(operationResult);
                    result.getExecution().getFailure().ifPresent(operationContext::failed);
                    return result;

     * @throws UnsupportedMethodException For Gradle versions older than 5.1, where this method is not supported.
     */
    @Nullable
    List<String> getExecutionReasons();

                    result.getCachingState(),
                    result.getReusedOutputOriginMetadata().orElse(null),
                    result.executedIncrementally(),
                    result.getExecutionReasons()
                ));

                try {
                    taskExecutionListener.afterExecute(task, state);
                    taskListener.afterExecute(task.getTaskIdentity(), state);

        and:
        taskSuccessResult(':tasks').executionReasons

        then:
        def e = thrown(UnsupportedMethodException)
        e.message.startsWith("Unsupported method: TaskExecutionResult.getExecutionReasons().")
    }

    @TargetGradleVersion('>=3.0 <5.1')
    def "throws UnsupportedMethodException for incremental property when target version does not support it"() {
        when:
        runBuild('tasks')