/** trimWhitespace Removes leading and trailing whitespace from fields that should not have any */
 private void trimWhitespace(Requisition req) {
   for (RequisitionNode node : req.getNodes()) {
     if (node.getForeignId() != null) {
       node.setForeignId(node.getForeignId().trim());
     }
     if (node.getParentForeignSource() != null) {
       node.setParentForeignSource(node.getParentForeignSource().trim());
     }
     if (node.getParentForeignId() != null) {
       node.setParentForeignId(node.getParentForeignId().trim());
     }
     for (RequisitionInterface intf : node.getInterfaces()) {
       if (intf.getIpAddr() != null) {
         intf.setIpAddr(intf.getIpAddr().trim());
       }
     }
   }
 }