612                 // Clear the reference to a Throwable

   612                 // Clear the reference to a Throwable

   613                 clone.cause = null;

   613                 clone.cause = null;

   614                 return clone;

   614                 return clone;

   615             } catch (CloneNotSupportedException e) {

   615             } catch (CloneNotSupportedException e) {

   616                 //this should never happen

   616                 //this should never happen

   618             }

   618             }

   619         }

   619         }

   620 

   620 

   621         String getFormat() {

   621         String getFormat() {

   622             return format;

   622             return format;