in lib/common_generator.js [381:391]
visitArgs(args, level) {
this.emit('(');
for (let i = 0; i < args.length; i++) {
const expr = args[i];
this.visitExpr(expr, level);
if (i !== args.length - 1) {
this.emit(', ');
}
}
this.emit(')');
}