static check(module, runtimeTemplate, feature) {
		if (!runtimeTemplate.supportsAsyncFunction()) {
			module.addWarning(new EnvironmentNotSupportAsyncWarning(module, feature));
		}
	}
Creates an instance of EnvironmentNotSupportAsyncWarning.
@param {Module} module module
@param {RuntimeTemplate} runtimeTemplate compilation
@param {Feature} feature feature