returning constant references from class methods

[celavek via Digitalmars-d-learn]

On Tuesday, 19 July 2016 at 12:33:53 UTC, ag0aep6g wrote:
>
>     final const(ulong[char]) nucleotide_counts () const
>     {
>         return cached_counts;
>     }

OMG! I'm so blind.
Never thought of trying the obvious way.

Thank you