return false;
            }
            if (!matcher.matches(requirement.getValue())) {
                getLog().debug("Toolchain {} doesn't match required property: {}", this, key);
                return false;
            }
        }
        return true;
    }

    protected Logger getLog() {
        return logger;
    }

    @Override

  }

  @Override
  boolean isPartialView() {
    return false;
  }

  @Override
  public int count(@Nullable Object element) {
    return contents.get(element);
  }

  @Override
  public int size() {
    return size;
  }

  @Override
  public ImmutableSet<E> elementSet() {
    ImmutableSet<E> result = elementSet;
    return (result == null) ? elementSet = new ElementSet() : result;
  }

                        return false;
                    }
                    if (Arrays.stream(webProtocols).anyMatch(p -> s.startsWith(p))) {
                        return web;
                    }
                    if (Arrays.stream(fileProtocols).anyMatch(p -> s.startsWith(p))) {
                        return file;
                    }
                    return true;

        return returnFirstPresentOrEmpty(MavenOptions::resume);
    }

    @Override
    public Optional<String> resumeFrom() {
        return returnFirstPresentOrEmpty(MavenOptions::resumeFrom);
    }

    @Override
    public Optional<List<String>> projects() {
        return collectListIfPresentOrEmpty(MavenOptions::projects);
    }

    @Override
    public Optional<Boolean> alsoMake() {

    }

    protected FessJsonResourceProvider createJsonResourceProvider() {
        return new FessJsonResourceProvider();
    }

    protected FessCurtainBeforeHook createCurtainBeforeHook() {
        return new FessCurtainBeforeHook();
    }

    protected FessCurtainFinallyHook createCurtainFinallyHook() {
        return new FessCurtainFinallyHook();
    }

     * returned in no particular order.
     *
     * @return an Iterator over the elements in this set.
     * @see ConcurrentModificationException
     */
    @Override
    public Iterator<E> iterator() {
        return map.keySet().iterator();
    }

    /**
     * Returns the number of elements in this set (its cardinality).
     *
     * @return the number of elements in this set (its cardinality).
     */

            return true;
        }

        // Check if --model is explicitly set (and not part of "all disabled" scenario)
        if (options.model().isPresent()) {
            return options.model().get();
        }

        return false;
    }

    @Override
    public String getDescription() {
        return "Applying Maven 4 compatibility fixes";
    }

    }

    ImmutableList<Double> asIterable() {
      return values;
    }

    double[] asArray() {
      return Doubles.toArray(values);
    }

    boolean hasAnyPositiveInfinity() {
      return Iterables.any(values, Predicates.equalTo(POSITIVE_INFINITY));
    }

    boolean hasAnyNegativeInfinity() {
      return Iterables.any(values, Predicates.equalTo(NEGATIVE_INFINITY));
    }

                return true;
            });
        }
        return Collections.emptyList();
    }

    /**
     * Converts a string to lowercase.
     *
     * @param term The string to convert.
     * @return The lowercase string.
     */
    private String toLowerCase(final String term) {
        return term != null ? term.toLowerCase(Locale.ROOT) : term;
    }

  }

  @Override
  public int size() {
    return array.length;
  }

  @Override
  boolean isPartialView() {
    return false;
  }

  @Override
  Object[] internalArray() {
    return array;
  }

  @Override
  int internalArrayStart() {
    return 0;
  }

  @Override
  int internalArrayEnd() {
    return array.length;
  }

  @Override