code: public String getDetailedMessage() {
          String prepend = getSourceInfoMessage();
          if (prepend == null || prepend.length() == 0) {
              return mMessage;
          }
          else {
              return prepend + ": " + mMessage;
          }
      }
docs: Returns the detailed message by prepending the standard message with
  source file information.
  
  @return The detailed message with the source file information
  
  @see #getMessage()