message: Implement `ReflectionAnalysis::get_class_source`
  Summary: Implemented `ReflectionAnalysis::get_class_source` which already had a definition in `ReflecitonAnalysis.h`. Essentially just a wrapper on `BaseIRAnalyzer<AbstractObjectEnvironment>::get_class_source`
diff: @@ -1197,6 +1197,14 @@ boost::optional<AbstractObject> ReflectionAnalysis::get_abstract_object(
  return m_analyzer->get_abstract_object(reg, insn);
  }
  +boost::optional<ClassObjectSource> ReflectionAnalysis::get_class_source(
  + size_t reg, IRInstruction* insn) const {
  + if (m_analyzer == nullptr) {
  + return boost::none;
  + }
  + return m_analyzer->get_class_source(reg, insn);
  +}
  +
  CallingContextMap ReflectionAnalysis::get_calling_context_partition() const {
  if (m_analyzer == nullptr) {
  return CallingContextMap::top();
  