code: public static String lookoupDefaultFilterOperationAbbreviation(String typeHint) {
          FilterOperation fOp = DEFAULT_NONSTRING_FILTER_OPERATION;
          if(typeHint == null || FilterTypeHint.STRING.equals(FilterTypeHint.getTypeHint(typeHint)))
              fOp = DEFAULT_STRING_FILTER_OPERATION;
  
          return fOp.getAbbreviation();
      }
docs: <p>
  Lookup the default filter operation's abbreviation given a filter type hint abbreviation.  The type hint
  should be obtained via {@link org.apache.beehive.netui.databinding.datagrid.api.filter.FilterTypeHint#getHint()}.
  The default filter operations for a given FilterTypeHint string maps to the following FilterOperationHint.
  The string returned is the associated FilterOperation's abbreviation
  <table>
  <tr><td>Type Hint</td><td></td></tr>
  <tr><td>{@link FilterTypeHint#DATE}</td><td>{@link FilterOperationHint#EQUAL}</td></tr>
  <tr><td>{@link FilterTypeHint#NUMERIC}</td><td>{@link FilterOperationHint#EQUAL}</td></tr>
  <tr><td>{@link FilterTypeHint#STRING}</td><td>{@link FilterOperationHint#CONTAINS}</td></tr>
  </table>
  </p>
  @param typeHint the type hint whose default operation to lookup
  @return String the abbreviation