)
Returns true if this string contains a match of other:
var string = 'Dart strings';
string.contains('D'); // true
string.contains(new RegExp(r'[A-Z]')); // true
If startIndex is provided, this method matches only at or after that
index:
string.contains('X', 1); // false
string.contains(new RegExp(r'[A-Z]'), 1); // false
startIndex must not be negative or greater than length.
Source
/**
* Returns true if this string contains a match of [other]:
*
* var string = 'Dart strings';
* string.contains('D'); // true
* string.contains(new RegExp(r'[A-Z]')); // true
*
* If [startIndex] is provided, this method matches only at or after that
* index:
*
* string.contains('X', 1); // false
* string.contains(new RegExp(r'[A-Z]'), 1); // false
*
* [startIndex] must not be negative or greater than [length].
*/
bool contains(Pattern other, [int startIndex = 0]);