Create method for runtimes to override for deciding which types of asides to use for given blocks
Create method for runtimes to override
for deciding which types of asides to use for given blocks

nagyistoce/edx-XBlock,mitodl/XBlock,mitodl/XBlock,edx/XBlock,4eek/XBlock,lovehhf/XBlock,edx-solutions/XBlock,4eek/XBlock,nagyistoce/edx-XBlock,lovehhf/XBlock,EDUlib/XBlock,edx/XBlock,edx-solutions/XBlock,EDUlib/XBlock