Would it be possible to allow sounds from resource packs to be played with the play effect?

For example, if in vanilla Minecraft I wanted to play a resource pack sound, I could use
/playsound some.example.sound RiotShielder

Sorry about the very slow progress with this feature. But it was finally added in the latest update thanks to @virustotalop with the syntax:

play (resource|[custom ]sound) [sound] pack %string% to %player% [at %location%] [(and|with) volume %number%] [(and|with) pitch %number%]

Can you give an example ?

Right now I get all sounds from the Sounds object, but I will see if it is possible to also add in stuff from a resource pack.