getFunctionOperator( op ) {

		const fnOp = wgslFnOpLib[ op ];

		if ( fnOp !== undefined ) {

			this._include( fnOp );

			return fnOp;

		}

		return null;

	}
Returns the native shader operator name for a given generic name.

@param {string} op - The operator name to resolve.
@return {?string} The resolved operator name.