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							- 'use strict'
 
- var experimentalWarnings = new Set();
 
- function emitExperimentalWarning(feature) {
 
-   if (experimentalWarnings.has(feature)) return;
 
-   var msg = feature + ' is an experimental feature. This feature could ' +
 
-        'change at any time';
 
-   experimentalWarnings.add(feature);
 
-   process.emitWarning(msg, 'ExperimentalWarning');
 
- }
 
- function noop() {}
 
- module.exports.emitExperimentalWarning = process.emitWarning
 
-   ? emitExperimentalWarning
 
-   : noop;
 
 
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