code: public void setDirectlyRelevantTypeQualifiers(MethodDescriptor methodDescriptor, Collection<TypeQualifierValue<?>> qualifiers) {
          methodToDirectlyRelevantQualifiersMap.put(methodDescriptor, qualifiers);
          allKnownQualifiers.addAll(qualifiers);
      }
docs: Set the collection of directly-relevant type qualifiers for a given
  method.
  
  @param methodDescriptor
  MethodDescriptor identifying a method
  @param qualifiers
  collection of directly-relevant type qualifiers for the method