code: function isUAInBrowserslist( userAgentString, environment = 'defaults' ) {
  	return matchesUA( userAgentString, {
  		env: environment,
  		ignorePatch: true,
  		ignoreMinor: true,
  		allowHigherVersions: true,
  	} );
  }
docs: Checks whether a user agent is included in the browser list for an environment.
  @param {String} userAgentString The user agent string.
  @param {String} environment The `browserslist` environment.
  
  @returns {Boolean} Whether the user agent is included in the browser list.