43         public static char charAt( this string str, int index )  in charAt()
49         public static bool endsWith( this string str, string value )  in endsWith()
55         public static int indexOf( this string str, char value )  in indexOf()
61         public static int indexOf( this string str, char value, int startIndex )  in indexOf()
67         public static int indexOf( this string str, string value )  in indexOf()
73         public static int indexOf( this string str, string value, int startIndex )  in indexOf()
79         public static int lastIndexOf( this string str, char value )  in lastIndexOf()
85         public static int lastIndexOf( this string str, string value )  in lastIndexOf()
91         public static int length( this string str )  in length()
97         public static string replace(this string str, char oldValue, char newValue)  in replace()
103         public static string replaceAll( this string str, string regex, string newValue )  in replaceAll()
109         public static string replaceFirst( this string str, string regex, string replacement )  in replaceFirst()
115         public static bool startsWith( this string str, string value )  in startsWith()
121         public static string substring( this string str, int startOffset )  in substring()
127         public static string substring(this string str, int startOffset, int endOffset)  in substring()
133         public static char[] toCharArray( this string str )  in toCharArray()
139         public static string toUpperCase( this string str )  in toUpperCase()
145         public static string trim( this string str )  in trim()