[BUG] Collection.hasLink('toString') === true

[MaxmaxmaximusGitHub]

Messages = new Mongo.Collection('messages')

Messages.addLinks({
	'user': {
		type      : 'one',
		collection: Meteor.users,
		field     : 'userId',
	}
})

console.log Messages.hasLink('toString') // true

[copleykj]

While I guess this is technically a bug, I'm not sure how you possibly stumbled across this 😂

[Prinzhorn]

grapher/lib/links/extension.js

Line 46 in 842dbb1

return !!this[LINK_STORAGE][name];

use hasOwnProperty (in multiple other places as well)