How to check whether a name is a locally accessible function?

How to check whether a name is a locally accessible function and only locally accessible?

For example, with

function out = top_level_function(name)

% ???
function helper2
end
end
function helper1
end

Desired:

>> top_level_function('helper1')
>> ans =
     1
>> otherwise_valid_function(); % executes
>> top_level_function('otherwise_valid_function')
>> ans =
     0

isa(eval(['@',name]),'function_handle') with the necessary not file for [SL: removed spam link], not builtin check at the same time probably works in the case where there is no local name shadowing but I am also wondering if that can permit name to be evaluated as an expression without it being a function name. And also what to do when there is local name shadowing?

[SL: removed link that looked like spam]

Answer 1

[Matt J]

One way,

function tf = top_level_function(name)

  s=functions(str2func(name));
  
  tf=strcmp( s.type , "scopedfunction") ;
  
end