assertEquals("7", Boolean.FALSE, BooleanConversionUtil.toBoolean("false"));
        assertEquals("8", Boolean.TRUE, BooleanConversionUtil.toBoolean("fase")); // typo
    }

    /**
     * Returns the dependency type id.
     * The id uniquely identifies this <i>dependency type</i>.
     *
     * @return the id of this type, never {@code null}.
     */
    @Nonnull
    String id();

    /**
     * Returns the dependency type language.
     *
     * @return the language of this type, never {@code null}.
     */
    @Nonnull
    Language getLanguage();

     * <li>do a topo sort on the graph that remains.</li>
     * </ul>
     * @throws DuplicateProjectException if any projects are duplicated by id
     */
    // MAVENAPI FIXME: the DAG used is NOT only used to represent the dependency relation,
    // but also for <parent>, <build><plugin>, <reports>. We need multiple DAG's
    // since a DAG can only handle 1 type of relationship properly.

        throw new IllegalArgumentException("No type mapping from " + fromClass + " to " + to);
      }
    }.visit(from);
  }

  /**
   * Resolves all type variables in {@code type} and all downstream types and returns a
   * corresponding type with type variables resolved.
   */
  public Type resolveType(Type type) {
    checkNotNull(type);
    if (type instanceof TypeVariable) {

        CURRENT = JAVA6;
      }
    }

    abstract Type newArrayType(Type componentType);

    abstract Type usedInGenericType(Type type);

    final ImmutableList<Type> usedInGenericType(Type[] types) {
      ImmutableList.Builder<Type> builder = ImmutableList.builder();
      for (Type type : types) {
        builder.add(usedInGenericType(type));
      }
      return builder.build();
    }

        artifact = new DefaultArtifact(groupId, artifactId, versionRange, scope, type, null, artifactHandler);
        assertEquals(groupId + ":" + artifactId + ":" + type, artifact.getDependencyConflictId());
    }

    @Test
    void testGetDependencyConflictIdNullScope() {
        artifact.setScope(null);
        assertEquals(groupId + ":" + artifactId + ":" + type + ":" + classifier, artifact.getDependencyConflictId());
    }

    @Test

    public static final String LOG_TYPE_SEARCH_REQTIMEAVG_DAY = "search_reqtimeavg_day_agg";

    public static final String LOG_TYPE_SEARCH_KEYWORD = "search_keyword_agg";

    public static final String LOG_TYPE_SEARCH_ZEROHIT = "search_zerohit_agg";

    public static final String LOG_TYPE_SEARCH_ZEROCLICK = "search_zeroclick_agg";

        }

        public ArtifactFactoryRequestBuilder type(String type) {
            this.type = type;
            return this;
        }

        public ArtifactFactoryRequest build() {
            return new DefaultArtifactFactoryRequest(
                    session, groupId, artifactId, version, classifier, extension, type);
        }

    private final String name;
    private TypeMetaData type;

    public ParameterMetaData(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public TypeMetaData getType() {
        return type;
    }

    public void setType(TypeMetaData type) {
        this.type = type;
    }

    public String getSignature() {

    @Override
    public List<Toolchain> getToolchains(MavenSession session, String type, Map<String, String> requirements) {
        List<ToolchainModel> models = session.getRequest().getToolchains().get(type);

        return selectToolchains(models, type, requirements);
    }

    private List<Toolchain> selectToolchains(
            List<ToolchainModel> models, String type, Map<String, String> requirements) {