getExportsConventionNames(name, convention) {
		if (this._conventionNames) {
			return this._conventionNames;
		}
		this._conventionNames = cssExportConvention(name, convention);
		return this._conventionNames;
	}
@param {string} name export name
@param {CssGeneratorExportsConvention} convention convention of the export name
@returns {string[]} convention results