When a function template has two parameterized types, one as the return value, and one as an argument, then THE FIRST TIME MUST BE EXPLICITLY CODED.
Explanation:
The act of implicit and explicit coding, and implicit and explicit code, is defined by context of execution of additional behavior or type setting/casting. Specifically, implicit or explicit methods are defined by the contexts in which they are meant to be used.
The explicit coding discipline favors clear and explicit expression of intent in the code.
The uses-cases dictate the structure of the application. What the application does should not be implicitly hidden in an organization that the framework is trying to dictate you. Avoid having folders like /controllers, /views at the highest level of folders organization, in favor of folders containing features and use-cases: /categories, /products, etc.
Template parameter represents a type that has not yet been specified, but that can be used in the template function as if it were a regular type.
