| class Foo | |
| /** | |
| * Returns the index within this string of the first occurrence of the specified character, starting from the specified [startIndex]. | |
| * | |
| * @param ignoreCase `true` to ignore character case when matching a character. By default `false`. | |
| * @returns An index of the first occurrence of [char] or -1 if none is found. | |
| */ | |
| fun Foo.indexOf(char: Char, startIndex: Int = 0, ignoreCase: Boolean = false): Int { | |
| return -1 | |
| } |