Variable Support on Particle's Material Option

I want variable material option in particle to be able to use placeholder, so that we can customize it more for example, show particles of block closest to the origin to visualize skill hitting blocks.

BlockBreakParticles:
  Skills:
  - setvariable{var=skill.blockhitted;type=STRING;val="<target.block.type>"} @BNO{r=1;limit=1}
  - message{m="<skill.var.blockhitted>"} @Self
  - particles{p=BLOCK;material="<skill.var.blockhitted>";a=20;vS=0.1;hS=0.1} @Origin