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// @flow strict
import invariant from './invariant';
import nodejsCustomInspectSymbol from './nodejsCustomInspectSymbol';
/**
* The `defineInspect()` function defines `inspect()` prototype method as alias of `toJSON`
*/
export default function defineInspect(
classObject: Class<any> | ((...args: Array<any>) => mixed),
): void {
const fn = classObject.prototype.toJSON;
invariant(typeof fn === 'function');
classObject.prototype.inspect = fn;
// istanbul ignore else (See: 'https://github.com/graphql/graphql-js/issues/2317')
if (nodejsCustomInspectSymbol) {
classObject.prototype[nodejsCustomInspectSymbol] = fn;
}
}
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