code: private static String PreFormatString(String aAttrName, boolean aPrependSeparator) {
          StringBuffer mStrBuff = new StringBuffer();
          if (aPrependSeparator)
              mStrBuff.append(",");
          mStrBuff.append(aAttrName);
          mStrBuff.append("=");
          return mStrBuff.toString();
      }
docs: Creates the pre-format string for <code>toString()</code>.
  Returns a string <code>aAttrName=</code>. If aPrependSeparator is true
  then prepends a comma(,) separator before the formatted string.
  <p>
  Example: aAttrName= or ,aAttrName= where the "," is controlled
  using the aPrependSeparator set to true.
  
  @param aAttrName A String attribute name value.
  @param aPrependSeparator A boolean value where <code>true</code> will append
  a "," to the String.
  
  @return A pre-format String.