.. is known as cascade notation . It allows you to not repeat the same target if you want to call several methods on the same object.23 Mar 2018
Read moreWhat does 3 dots mean in Dart?
Since version 2.3, Dart adds a new operator called spread which uses three dots ( … ) notations. It can be used to extend the elements of a Collection . The examples below show the usage of the notation on List , Set , and Map .
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