code: protected void appendSummarySize(StringBuilder buffer, String fieldName, int size) {
          buffer.append(sizeStartText);
          buffer.append(size);
          buffer.append(sizeEndText);
      }
docs: <p>Append to the <code>toString</code> a size summary.</p>
  <p/>
  <p>The size summary is used to summarize the contents of
  <code>Collections</code>, <code>Maps</code> and arrays.</p>
  <p/>
  <p>The output consists of a prefix, the passed in size
  and a suffix.</p>
  <p/>
  <p>The default format is <code>'&lt;size=n&gt;'<code>.</p>
  
  @param buffer    the <code>StringBuilder</code> to populate
  @param fieldName the field name, typically not used as already appended
  @param size      the size to append