code: public void setUserAttributeNames(java.util.Collection<String> userAttributeNames) {
          if (userAttributeNames == null) {
              this.userAttributeNames = null;
              return;
          }
  
          this.userAttributeNames = new java.util.ArrayList<String>(userAttributeNames);
      }
docs: <p>
  An array of strings representing the user attribute names you wish to delete.
  </p>
  <p>
  For custom attributes, you must prepend the <code>custom:</code> prefix to the attribute name.
  </p>
  
  @param userAttributeNames
  An array of strings representing the user attribute names you wish to delete.</p>
  <p>
  For custom attributes, you must prepend the <code>custom:</code> prefix to the attribute name.