});
    }

    private static <T> Map<AccessorKey, T> diff(Map<AccessorKey, T> first, Map<AccessorKey, T> second) {
        return first.entrySet().stream()
            .filter(e -> !second.containsKey(e.getKey()))
            .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
    }

import org.gradle.language.base.plugins.LifecycleBasePlugin;
import org.ysb33r.grolifant.api.core.jvm.ExecutionMode;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static java.util.Arrays.asList;
import static java.util.Collections.singletonList;
import static java.util.Collections.singletonMap;

public class GradleUserManualPlugin implements Plugin<Project> {

        Map<AccessorKey, ReplacedAccessor> oldAccessorsOfUpgradedProperties = (Map<AccessorKey, ReplacedAccessor>) context.getUserData().get(OLD_ACCESSORS_OF_UPGRADED_PROPERTIES);

        // Find accessors that were not removed but should be
        Map<AccessorKey, ReplacedAccessor> keptAccessors = new HashMap<>(oldAccessorsOfUpgradedProperties);

        }
    }

    private static void initExecutionMode(String[] args) {
        if (args.length != 1) {
            throw new IllegalArgumentException("Requires 1 param: " + Stream.of(ExecutionMode.values()).map(ExecutionMode::toString).collect(Collectors.joining("/")));
        }
        executionMode = ExecutionMode.valueOf(args[0]);

            // We still want to report the violation if @since is not added to a method
            return false;
        }

        Map<AccessorKey, UpgradedProperty> currentAccessors = context.getUserData(CURRENT_ACCESSORS_OF_UPGRADED_PROPERTIES);
        Map<AccessorKey, ReplacedAccessor> oldAccessors = context.getUserData(OLD_ACCESSORS_OF_UPGRADED_PROPERTIES);