tasks.withType<JavaCompile> {
            options.isFork = true
            options.isIncremental = true
            options.forkOptions.memoryInitialSize = compilerMemory
            options.forkOptions.memoryMaximumSize = compilerMemory
        }
        tasks.withType<GroovyCompile> {
            options.isFork = true
            options.isIncremental = true
            options.forkOptions.memoryInitialSize = compilerMemory

        /**
         * Returns if this task was executed incrementally.
         *
         * See {@code org.gradle.work.InputChanges#isIncremental()}.
         */
        @NotUsedByScanPlugin("used to report incrementality to TAPI progress listeners")
        boolean isIncremental();

    }

    private ExecuteTaskBuildOperationType() {

    }

    public Optional<InputChangesInternal> getInputChanges() {
        return Optional.ofNullable(inputChanges);
    }

    public boolean isIncrementalExecution() {
        return inputChanges != null && inputChanges.isIncremental();
    }

    @Override
    public CachingState getCachingState() {
        return cachingState;
    }

            .orElseThrow(() -> new IllegalStateException("Changes are not tracked, unable determine incremental changes."));
        InputChangesInternal inputChanges = changes.createInputChanges();
        if (!inputChanges.isIncremental()) {
            LOGGER.info("The input changes require a full rebuild for incremental {}.", work.getDisplayName());
        }
        return inputChanges;
    }

        }
    }

    @Override
    public List<String> getUpToDateMessages() {
        return executionReasons;
    }

    @Override
    public boolean isIncremental() {
        return incremental;
    }

import org.gradle.api.internal.tasks.compile.JavaCompileExecutableUtils;
import org.gradle.api.internal.tasks.compile.JavaCompileSpec;
import org.gradle.api.internal.tasks.compile.incremental.IncrementalCompilerFactory;
import org.gradle.api.internal.tasks.compile.incremental.recomp.JavaRecompilationSpecProvider;
import org.gradle.api.jvm.ModularitySpec;
import org.gradle.api.model.ObjectFactory;
import org.gradle.api.provider.Property;

    def "throws UnsupportedMethodException for incremental property when target version does not support it"() {
        when:
        runBuild('tasks')

        and:
        taskSuccessResult(':tasks').incremental

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

import org.gradle.api.internal.tasks.compile.MinimalGroovyCompileOptions;
import org.gradle.api.internal.tasks.compile.incremental.IncrementalCompilerFactory;
import org.gradle.api.internal.tasks.compile.incremental.recomp.GroovyRecompilationSpecProvider;
import org.gradle.api.internal.tasks.compile.incremental.recomp.RecompilationSpecProvider;
import org.gradle.api.model.ObjectFactory;
import org.gradle.api.provider.Property;

        boolean incremental = result != null && result.isIncremental();

        if (state.getUpToDate()) {
            return new DefaultTaskSuccessResult(startTime, endTime, true, state.isFromCache(), state.getSkipMessage(), incremental, Collections.emptyList());
        } else if (state.getSkipped()) {

            case DID_NO_WORK:
                return UP_TO_DATE;
            case DID_WORK:
                return context.getInputChanges()
                    .filter(InputChanges::isIncremental)
                    .map(Functions.constant(EXECUTED_INCREMENTALLY))
                    .orElse(EXECUTED_NON_INCREMENTALLY);
            default:
                throw new AssertionError();
        }
    }