schema3 method
Create store schema, keyPath is String, a List<String> or SdbKeyPath
Implementation
SdbIndexSchema schema3(
String keyPath1,
String keyPath2,
String keyPath3, {
bool? unique,
}) {
return SdbIndexSchema(
this,
SdbKeyPath.multi([
sdbKeyPath<I1>(keyPath1),
sdbKeyPath<I2>(keyPath2),
sdbKeyPath<I3>(keyPath3),
]),
unique: unique ?? false,
);
}