Missing namespace in function_exists call

[khalyomede]

Description

When the code loads functions, it should detect the existance of the function under the namespace instead of just the name of the function

Expected behavior

The call of function_exists() use the full qualified namespace.

namespace Folded;

if (!function_exists("Folded\theFunction")) {
  // load the function now
}

Actual behavior

Functions declared twice enters in collision.

Alternatives solutions

None.