How to use the escapeSingleQuotes method?

Code Snippet :

public static String getRowById(String sobjName, Id id) {
    Map<String, Schema.SObjectField> objectFields =
        Schema.getGlobalDescribe().get(sObjName).getDescribe().fields.getMap();

    return 'SELECT ' + String.join( objectFields.keySet(), ', ')
           + ' FROM ' + sObjName
           + ' WHERE Id = \'' + String.escapeSingleQuotes(Id) + '\''
           + ' LIMIT 1';
}