def visitMultiElementGroup(self, ctx: ShExDocParser.MultiElementGroupContext):
        """ multiElementGroup: unaryShape (';' unaryShape)+ ';'? """
        self.expression = EachOf(expressions=[])
        for us in ctx.unaryShape():
            parser = ShexOneOfShapeParser(self.context)
            parser.visit(us)
            self.expression.expressions.append(parser.expression)
multiElementGroup: unaryShape (';' unaryShape)+ ';'?