Property definitions

nitc :: parser_prod $ AStartStringExpr :: init_astartstringexpr
	init init_astartstringexpr (
		n_string: nullable TStartString
	)
	do
		_n_string = n_string.as(not null)
		n_string.parent = self
	end
src/parser/parser_prod.nit:6760,2--6766,4