Property definitions

nitc :: parser_prod $ AStarstarAssignOp :: init_astarstarassignop
	init init_astarstarassignop (
		n_op: nullable TStarstareq
	)
	do
		_n_op = n_op.as(not null)
		n_op.parent = self
	end
src/parser/parser_prod.nit:7830,2--7836,4