Function getKnownSymbol

getKnownSymbol<T>(name, noPoly?): T
If Symbols are supported then get the property of the global Symbol, if Symbol's are not supported and noPoly is true it returns null. Used to access the well known symbols.
Type Parameters
- T = symbol
Parameters
- name: string | WellKnownSymbols
  The property name to return (if it exists) for Symbol
- Optional noPoly: boolean
  Flag indicating whether to return a polyfill if symbols are not supported.
Returns T
The value of the property if present
Example
```
// If Symbol is supported in the runtime
getKnownSymbol("toStringTag") === Symbol.toStringTag;                // true
getKnownSymbol(WellKnownSymbols.toStringTag) === Symbol.toStringTag; // true
```
- Defined in lib/src/symbol/symbol.ts:81