docs: void addFieldInfo(final FieldInfoList fieldInfoList, final Map<String, ClassInfo> classNameToClassInfo) {
          for (final FieldInfo fi : fieldInfoList) {
              // Index field annotations
              addFieldOrMethodAnnotationInfo(fi.annotationInfo, /* isField = */ true, classNameToClassInfo);
          }
          if (this.fieldInfo == null) {
              this.fieldInfo = fieldInfoList;
          } else {
              this.fieldInfo.addAll(fieldInfoList);
          }
      }