src/generators/Generator.js/Generator/getUniqueName
class Generator:	getUniqueName ( name ) {
		if ( test ) name = `${name}$`;
		let alias = name;
		for ( let i = 1; reservedNames.has( alias ) || this.importedNames.has( alias ) || this._usedNames.has( alias ); alias = `${name}_${i++}` );
		this._usedNames.add( alias );
		return alias;
	}