private static @Nullable String getArraysConversionMethod(PsiType itemType, PsiType expectedType) {
    String methodName = "asList";
    PsiType componentType = PsiUtil.extractIterableTypeParameter(expectedType, true);
    if (componentType == null) {
      methodName = "stream";
      componentType = getStreamComponentType(expectedType);
      PsiPrimitiveType unboxedType = PsiPrimitiveType.getUnboxedType(componentType);
      if (unboxedType != null) {
        componentType = unboxedType;
      }
    }

    if (componentType == null ||
        !(itemType instanceof PsiArrayType) ||
        !componentType.isAssignableFrom(((PsiArrayType)itemType).getComponentType())) {
      return null;

    }
    return methodName;
  }
private static @Nullable String getArraysConversionMethod(PsiType itemType, PsiType expectedType)