When handling special cases that are logically distinct from
the function's main branch, it improves code quality (through
readability and maintainability) to place those first and with
an early return.
The has the benefit of the main return statement being easy to
find at the end of the function. (Not early and/or in a block).
It also means when working on the code, there is generally a
less complexity and fewer nesting levels, given that most code
is in the main branch. This makes is easier and quicker to verify
that code does what it should, as well as making it easy to
extend in the future. When considering to add code to end of a
function's main scope, it should relate to the function's main
branch by default, not a special case. For example, a getName()
method should not end with a top-level statement 'return false'
(unless it is a stub). Rather, one would expect it to end with
`return name`.
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