[line 1923]
<span class="constraint ContentsNotNull">This field must not contain {@code null} elements.</span>
<span class="constraint DistinctIds">Elements in this field must have distinct IDs for following Operators : SET, REMOVE.</span> <span class="constraint NotEmpty">This field must contain at least one element.</span> <span class="constraint Required">This field is required and should not be {@code null}.</span> <span class="constraint SupportedOperators">The following Operators are supported: ADD, SET.</span>
Adds and updates user lists. <p class="note">Note:UserListOperation does not support the
