import org.apache.maven.lifecycle.mapping.Lifecycle;
import org.apache.maven.lifecycle.mapping.LifecycleMapping;
import org.apache.maven.lifecycle.mapping.LifecyclePhase;

import static java.util.Objects.requireNonNull;

/**
 * Base lifecycle mapping provider, ie per-packaging plugin bindings for {@code default} lifecycle.
 */
public abstract class AbstractLifecycleMappingProvider implements Provider<LifecycleMapping> {

      /*
       * The following requireNonNull calls are safe because we use jlaStackTrace() only if
       * lazyStackTraceIsLazy() returns true.
       */
      @Override
      public StackTraceElement get(int n) {
        return (StackTraceElement)
            invokeAccessibleNonThrowingMethod(
                requireNonNull(getStackTraceElementMethod), requireNonNull(jla), t, n);
      }

      @Override

      /*
       * The following requireNonNull calls are safe because we use jlaStackTrace() only if
       * lazyStackTraceIsLazy() returns true.
       */
      @Override
      public StackTraceElement get(int n) {
        return (StackTraceElement)
            invokeAccessibleNonThrowingMethod(
                requireNonNull(getStackTraceElementMethod), requireNonNull(jla), t, n);
      }

      @Override

          remaining = entry.getCount();
        }
        remaining--;
        /*
         * requireNonNull is safe because `remaining` starts at 0, forcing us to initialize
         * `element` above. After that, we never clear it.
         */
        return requireNonNull(element);
      }
    };
  }

  @LazyInit @CheckForNull private transient ImmutableList<E> asList;

  @Override

      C columnKey = cell.getColumnKey();
      V value = cell.getValue();

      /*
       * These requireNonNull calls are safe because we construct the maps to hold all the provided
       * cells.
       */
      cellRowIndices[i] = requireNonNull(rowIndex.get(rowKey));
      Map<C, V> thisRow = requireNonNull(rows.get(rowKey));
      cellColumnInRowIndices[i] = thisRow.size();
      V oldValue = thisRow.put(columnKey, value);

            throw cacheRecord.getException();
        }

        return cacheRecord;
    }

    public CacheRecord put(Key key, List<Artifact> pluginArtifacts) {
        Objects.requireNonNull(pluginArtifacts, "pluginArtifacts cannot be null");

        assertUniqueKey(key);

        CacheRecord record = new CacheRecord(Collections.unmodifiableList(new ArrayList<>(pluginArtifacts)));

       *   modification is undefined, anyway.)
       */
      requireNonNull(rowEntry);
      Entry<C, V> columnEntry = columnIterator.next();
      return Tables.immutableCell(rowEntry.getKey(), columnEntry.getKey(), columnEntry.getValue());
    }

    @Override
    public void remove() {
      columnIterator.remove();
      /*
       * requireNonNull is safe because:
       *

import java.util.function.Supplier;

import org.apache.maven.api.plugin.Log;
import org.slf4j.Logger;

import static java.util.Objects.requireNonNull;

public class DefaultLog implements Log {
    private final Logger logger;

    public DefaultLog(Logger logger) {
        this.logger = requireNonNull(logger);
    }

    public void debug(CharSequence content) {
        if (isDebugEnabled()) {

              0,
              size,
              (e1, e2) -> {
                // requireNonNull is safe because the first `size` elements have been filled in.
                requireNonNull(e1);
                requireNonNull(e2);
                return comparator.compare(e1.getKey(), e2.getKey());
              });
          // requireNonNull is safe because the first `size` elements have been filled in.

          submittingTaskQueue.nextTask = task;
          // requireNonNull(delegate) is safe for reasons similar to requireNonNull(sequencer).
          submittingTaskQueue.nextExecutor = requireNonNull(delegate);
          delegate = null;
        } else {
          // requireNonNull(delegate) is safe for reasons similar to requireNonNull(sequencer).
          Executor localDelegate = requireNonNull(delegate);
          delegate = null;