}
        List<Object> newItems = value.replace(original, supplier);
        if (newItems == null) {
            return this;
        }
        DefaultConfigurableFileCollection newFiles = new DefaultConfigurableFileCollection(null, resolver, dependencyFactory, patternSetFactory, host);
        newFiles.from(newItems);
        return newFiles;
    }

    private void assertMutable() {

    @Override
    public ConfigurableFileCollection configurableFiles() {
        return new DefaultConfigurableFileCollection(null, fileResolver, taskDependencyFactory, patternSetFactory, propertyHost);
    }

    @Override
    public ConfigurableFileCollection configurableFiles(String displayName) {
        return new DefaultConfigurableFileCollection(displayName, fileResolver, taskDependencyFactory, patternSetFactory, propertyHost);
    }