if (!source.isEmpty()) {
          return false;
        }
      }
      return true;
    }

    @Override
    public Optional<Long> lengthIfKnown() {
      long result = 0L;
      for (CharSource source : sources) {
        Optional<Long> lengthIfKnown = source.lengthIfKnown();
        if (!lengthIfKnown.isPresent()) {
          return Optional.absent();
        }

        if (!source.isEmpty()) {
          return false;
        }
      }
      return true;
    }

    @Override
    public Optional<Long> lengthIfKnown() {
      long result = 0L;
      for (CharSource source : sources) {
        Optional<Long> lengthIfKnown = source.lengthIfKnown();
        if (!lengthIfKnown.isPresent()) {
          return Optional.absent();
        }

   *
   * @param sources the sources to concatenate
   * @return a {@code ByteSource} containing the concatenated data
   * @throws NullPointerException if any of {@code sources} is {@code null}
   * @since 15.0
   */
  public static ByteSource concat(ByteSource... sources) {
    return concat(ImmutableList.copyOf(sources));
  }

  /**

     * If the given language is {@code null}, then this method returns the enabled sources for all languages.
     * An arbitrary number of source roots may exist for the same scope and language.
     * It may be, for example, the case of a multi-versions project.
     * The iteration order is the order in which the sources are declared in the POM file.
     *

            return List.of(
                    alias("generate-sources", SOURCES),
                    alias("process-sources", AFTER + SOURCES),
                    alias("generate-resources", RESOURCES),
                    alias("process-resources", AFTER + RESOURCES),
                    alias("process-classes", AFTER + COMPILE),
                    alias("generate-test-sources", TEST_SOURCES),

            },
            block = block
        )

    /**
     * Runs the binary compatibility check against two source trees.
     *
     * The fixture build supports both Java and Kotlin sources.
     *
     * @param v1 sources producer for V1, receiver is the `src/main` directory
     * @param v2 sources producer for V2, receiver is the `src/main` directory
     * @param block convenience block invoked on the result

org.apache.maven.plugin.coreit.ItMojo java per-lookup once-per-session xpp3-reader Does nothing. false true false false false true generate-sources org.apache.maven.plugin.coreit.CMojo java per-lookup once-per-session models java.lang.String[] false true version java.lang.String false true ${version} xpp3-writer Does nothing. false true false false false true generate-sources org.apache.maven.plugin.coreit.BMojo java per-lookup once-per-session models java.lang.String[] false true version java.lang.String...

    /** Returns the unbuffered stream with the value for [index]. */
    fun getSource(index: Int): Source = sources[index]

    /** Returns the byte length of the value for [index]. */
    fun getLength(index: Int): Long = lengths[index]

    override fun close() {
      for (source in sources) {
        source.closeQuietly()
      }
    }
  }

  /** Edits the values for an entry. */

## Table of Contents

- [Supported Migration Sources](#supported-migration-sources)
- [Pre-Migration Planning](#pre-migration-planning)
- [Migration Methods](#migration-methods)
  - [Google Search Appliance (GSA)](#google-search-appliance-gsa--google-mini)

import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Collection;
import java.util.List;
import java.util.Map;

import org.apache.maven.api.Constants;
import org.apache.maven.api.services.Sources;
import org.apache.maven.model.Model;
import org.apache.maven.model.v4.MavenStaxReader;
import org.apache.maven.project.MavenProject;
import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.SessionData;