docs: function(sIdentifier) {
                 if (-1 !== A_OTHER_SUBSTITUTABLE_LITERALS.indexOf(sIdentifier)) {
                   fCountPrimaryExpression(
                       EPrimaryExpressionCategories.N_NULL_AND_BOOLEAN_LITERALS,
                       EValuePrefixes.S_SYMBOLIC + sIdentifier);
                 } else {
                   if ('eval' === sIdentifier) {
                     oSourceElementData.nCategory =
                         ESourceElementCategories.N_EVAL;
                   }
                   fAddIdentifier(sIdentifier);
                 }
               }