code: def get_expr(self, ctx):
          
          varname = ctx.lookup_variable(self.varname)
          if varname is None:
              val = ctx.lookup_constant(self.varname)
              if val:
                  try:
                      return val.generate_code(ctx)
                  except AttributeError:
                      return val
              raise MuvError(
                  "Undeclared identifier '%s'." % self.varname,
                  position=self.position
              )
          if len(self.indexing) == 0:
              return "{var} @".format(
                  var=varname,
              )
          if len(self.indexing) == 1:
              return "{var} @ {idx} []".format(
                  var=varname,
                  idx=self.indexing[0],
              )
          return (
              "{var} @ {{ {idx} }}list array_nested_get".format(
                  var=varname,
                  idx=" ".join(str(x) for x in self.indexing),
              )
          )
docs: Returns the MUF needed to get the contents of the lvalue.
          Returned MUF will push the contained value onto the stack.