docs: final ImmutableBiMap<String, ExecutableElement> propertyNameToMethodMap(
        Set<ExecutableElement> propertyMethods) {
      Map<String, ExecutableElement> map = new LinkedHashMap<>();
      Set<String> reportedDups = new HashSet<>();
      boolean allPrefixed = gettersAllPrefixed(propertyMethods);
      for (ExecutableElement method : propertyMethods) {
        String methodName = method.getSimpleName().toString();
        String name = allPrefixed ? nameWithoutPrefix(methodName) : methodName;
        ExecutableElement old = map.put(name, method);
        if (old != null) {
          String message = "More than one @" + simpleAnnotationName + " property called " + name;
          errorReporter.reportError(message, method);
          if (reportedDups.add(name)) {
            errorReporter.reportError(message, old);
          }
        }
      }
      return ImmutableBiMap.copyOf(map);
    }