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'use strict';
var tryToString = require('../internals/try-to-string');
var $TypeError = TypeError;
// Perform ? RequireInternalSlot(M, [[MapData]])
module.exports = function (it) {
if (typeof it == 'object' && 'size' in it && 'has' in it && 'get' in it && 'set' in it && 'delete' in it && 'entries' in it) return it;
throw new $TypeError(tryToString(it) + ' is not a map');
};