Java 7 -> 8

streams.java

// Old way of writing it
List<PartFilter> partFilters = FilterQueryBuilder.getFilters(PartFilter.class, clonedFilters);
for (PartFilter f : partFilters) {
  if (f.getPartTerms() != null) {
    f.getPartTerms().remove("sub_category");
  }
}

// New way with Java 8 Stream API and Lambda functions
FilterQueryBuilder.getFilters(PartFilter.class, clonedFilters).stream()
    .filter(f -> f.getPartTerms() != null)
    .forEach(filter -> filter.getPartTerms().remove("sub_category"));