lastIndexOf
Finds the last matching character.
Searches backwards from startIndex for char.
Finds the last matching substring, starting at the last character.
Searches backwards from startIndex for string, comparing UTF-16 code units.
Finds the last matching character.
Searches backwards from startIndex for char.
Finds the last matching substring, starting at the last character.
Searches backwards from startIndex for string, comparing UTF-16 code units.