global
Get the global object for the current context.
    GLOBAL([newGlobal])
  
  Optionally sets, and returns the global that this environment provides. It will be one of:
var GLOBAL = require('can-globals/global/global');
var g = GLOBAL();
// In a browser
console.log(g === window); // -> true
Parameters
- newGlobal {Object}:An optional global-like object to set as the context's global 
Returns
 {Object}: 
The global object for this JavaScript environment.
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