whereStartsWith method
Add a constraint for finding string values that start with a provided string.
This query will use the backend index, so it will be fast even for large datasets.
Implementation
void whereStartsWith(String key, String prefix,
{bool caseInsensitive = false}) {
String regex = RegExp.escape(prefix);
regex = "${caseInsensitive ? "(?i)" : ""}^$regex";
whereMatches(key, regex);
}