matchAsPrefix method Null safety

Match? matchAsPrefix (
  1. String string,
  2. [int start = 0]

Match this pattern against the start of string.

If start is provided, it must be an integer in the range 0 .. string.length. In that case, this patten is tested against the string at the start position. That is, a Match is returned if the pattern can match a part of the string starting from position start. Returns null if the pattern doesn't match.


Match? matchAsPrefix(String string, [int start = 0]);