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rOACCT/node_modules/invariant/browser.js
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browser.js
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			/**
			* Copyright (c) 2013-present, Facebook, Inc.
			*
			* This source code is licensed under the MIT license found in the
			* LICENSE file in the root directory of this source tree.
			*/

			'use strict';

			/**
			* Use invariant() to assert state which your program assumes to be true.
			*
			* Provide sprintf-style format (only %s is supported) and arguments
			* to provide information about what broke and what you were
			* expecting.
			*
			* The invariant message will be stripped in production, but the invariant
			* will remain to ensure logic does not differ in production.
			*/

			var invariant = function(condition, format, a, b, c, d, e, f) {
			if (process.env.NODE_ENV !== 'production') {
			if (format === undefined) {
			throw new Error('invariant requires an error message argument');
			}
			}

			if (!condition) {
			var error;
			if (format === undefined) {
			error = new Error(
			'Minified exception occurred; use the non-minified dev environment ' +
			'for the full error message and additional helpful warnings.'
			);
			} else {
			var args = [a, b, c, d, e, f];
			var argIndex = 0;
			error = new Error(
			format.replace(/%s/g, function() { return args[argIndex++]; })
			);
			error.name = 'Invariant Violation';
			}

			error.framesToPop = 1; // we don't care about invariant's own frame
			throw error;
			}
			};

			module.exports = invariant;