Retrieving a symbol name in JavaScript
Having a variable with a symbol, you
can retrieve its name in the global
registry. This is done using the
Symbol.keyFor method. Let's
try. Let's create a symbol with a name:
let sym = Symbol.for('test');
Get its name by its variable:
let key = Symbol.keyFor(sym);
console.log(key); // shows 'test'
Given two symbols:
let sym1 = Symbol.for('test1');
let sym2 = Symbol.for('test2');
Retrieve their names.
