whereContains method
Performs a search to see if String contains other string
Implementation
void whereContains(String column, String value,
{bool caseSensitive = false}) {
if (caseSensitive) {
queries.add(MapEntry<String, dynamic>(
_singleQuery, '"$column":{"\$regex": "$value"}'));
} else {
queries.add(MapEntry<String, dynamic>(
_singleQuery, '"$column":{"\$regex": "$value", "\$options": "i"}'));
}
}