code: public void setDeveloperUserIdentifierList(java.util.Collection<String> developerUserIdentifierList) {
          if (developerUserIdentifierList == null) {
              this.developerUserIdentifierList = null;
              return;
          }
  
          this.developerUserIdentifierList = new java.util.ArrayList<String>(developerUserIdentifierList);
      }
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>
  
  @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.