You should almost never use it as a field of something or a method parameter . So the answer is specific to Optional: it isn’t “a general purpose Maybe type”; as such, it is limited, and it may be limited in ways that limit its usefulness as a field type or a parameter type.
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In Dart, there are two ways to specify optional parameters: they can be either positional or named. Optional parameters are parameters which don’t have to be specified when calling given function . Optional parameters must be declared after required parameters.17 Oca 2019
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What are Optional Parameters? By definition, an Optional Parameter is a handy feature that enables programmers to pass less number of parameters to a function and assign a default value . Firstly, let us first understand what the word Optional Parameter means. Parameters are the names listed in the function definition.
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