code: public static String quote(String term) {
          return new String(quote(term.getBytes(Constants.UTF8)), Constants.UTF8);
      }
docs: Properly quotes terms in a column visibility expression. If no quoting is needed, then nothing is done.
  <p>
  <p>
  Examples of using quote :
  
  <pre>
  import static org.apache.accumulo.core.security.ColumnVisibility.quote;
  .
  .
  .
  ColumnVisibility cv = new ColumnVisibility(quote(&quot;A#C&quot;) + &quot;&amp;&quot; + quote(&quot;FOO&quot;));
  </pre>
  
  @param term term to quote
  @return quoted term (unquoted if unnecessary)