code: public LookupDeveloperIdentityResult withDeveloperUserIdentifierList(String... developerUserIdentifierList) {
          if (this.developerUserIdentifierList == null) {
              setDeveloperUserIdentifierList(new java.util.ArrayList<String>(developerUserIdentifierList.length));
          }
          for (String ele : developerUserIdentifierList) {
              this.developerUserIdentifierList.add(ele);
          }
          return this;
      }
docs: <p>
  This is the list of developer user identifiers associated with an identity ID. Cognito supports the association
  of multiple developer user identifiers with an identity ID.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setDeveloperUserIdentifierList(java.util.Collection)} or
  {@link #withDeveloperUserIdentifierList(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param developerUserIdentifierList
  This is the list of developer user identifiers associated with an identity ID. Cognito supports the
  association of multiple developer user identifiers with an identity ID.
  @return Returns a reference to this object so that method calls can be chained together.