try {
                        workAvailable.await();
                    } catch (InterruptedException e) {
                        throw UncheckedException.throwAsUncheckedException(e);
                    }
                }

            } finally {
                lock.unlock();
            }

            return getReadyExecution();
        }

        /**

        return new InstantiatingAction<>(DefaultConfigurableRules.of(rule), instantiator, (target, throwable) -> {
            throw UncheckedException.throwAsUncheckedException(throwable);
        });
    }

        @Override
        public InputStream open() {
            try {
                return Files.newInputStream(path);
            } catch (IOException e) {
                throw UncheckedException.throwAsUncheckedException(e);
            }
        }

        @Override
        public void copyTo(OutputStream output) {
            throw new UnsupportedOperationException("Copy to not supported for filters");
        }

                        urlClassLoader.addURL(uri.toURL());
                    }
                }
            } catch (URISyntaxException | MalformedURLException e) {
                throw UncheckedException.throwAsUncheckedException(e);
            }
        }
        return classLoader;
    }

    private static Set<URI> uris(VisitableURLClassLoader classLoader) throws URISyntaxException {

        } catch (Exception e) {
            throw UncheckedException.throwAsUncheckedException(e);
        }
    }

        String path;
        try {
            path = URLDecoder.decode(uri.getPath(), "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw UncheckedException.throwAsUncheckedException(e); // fail fast, this should not happen
        }
        while (path.startsWith("/")) {
            path = path.substring(1);
        }
        return path;
    }

    @Override
    public void stop() {
        finalizerThread.exit();
        try {
            finalizerThread.join();
        } catch (InterruptedException e) {
            throw UncheckedException.throwAsUncheckedException(e);
        }
    }

    public int size() {
        return cacheEntries.size();
    }

    public boolean isEmpty() {
        return cacheEntries.isEmpty();
    }

    /**

            FileUtils.deleteQuietly(destination);
            action.execute(destination);
        } catch (Throwable t) {
            FileUtils.deleteQuietly(destination);
            throw UncheckedException.throwAsUncheckedException(t);
        } finally {
            deleteFileQuietly(inProgressMarkerFile);
        }
    }

    @Override
    public Set<? extends LocallyAvailableResource> search(String pattern) {

    }

    private static URL toURL(File file) {
        try {
            return file.toURI().toURL();
        } catch (MalformedURLException e) {
            throw UncheckedException.throwAsUncheckedException(e);
        }
    }

    @Override
    public ClassPath plus(ClassPath other) {
        if (isEmpty()) {
            return other;
        }
        if (other.isEmpty()) {

                propertiesBuilder.put(e.getKey(), e.getValue().call());
            }
        } catch (Exception e) {
            throw UncheckedException.throwAsUncheckedException(e);
        }
        return propertiesBuilder.build();
    }

    /**
     * Sets all properties to be written to the properties file replacing any existing properties.
     *