code: public void setDBSubnetGroups(java.util.Collection<DBSubnetGroup> dBSubnetGroups) {
          if (dBSubnetGroups == null) {
              this.dBSubnetGroups = null;
              return;
          }
  
          this.dBSubnetGroups = new java.util.ArrayList<DBSubnetGroup>(dBSubnetGroups);
      }
docs: <p>
  A list of <a>DBSubnetGroup</a> instances.
  </p>
  
  @param dBSubnetGroups
  A list of <a>DBSubnetGroup</a> instances.