isEqual method
Returns true
if the current and other
queries are equal - they
represent the exactly same location, have the same query parameters,
and are from the same instance of App.
Equivalent queries share the same sort order, limits, starting
and ending points.
Two DatabaseReference objects are equivalent if they represent the same location and are from the same instance of App.
Implementation
bool isEqual(Query other) => jsObject.isEqual(other.jsObject);