Variant constructor

const Variant({
  1. String? key,
  2. String? value,
  3. Object? payload,
  4. String? expKey,
  5. Map<String, Object?>? metadata,
})

Creates a Variant with the given fields.

Implementation

const Variant({
  this.key,
  this.value,
  this.payload,
  this.expKey,
  this.metadata,
});