java - Gradle DSL method not found: storeFile() -

I am using Android Studio 1.1.0. When I try to sync my Gradle file, I get the following error:

Gradle DSL method was not found: storeFile ()

Here's my Gradle configuration is:

  apply plugin: 'com.android.application' Android {compileSdkVersion 21 buildToolsVersion "21.1.2" defaultConfig {applicationId "skripsi.ubm.studenttracking" minSdkVersion 16 targetSdkVersion 21 versionCode 1 versionName " 1.0 "} {signConfigs release {storeFile (project.property (" Students_tracking_keystore.jks ") + '.keystore") storePassword "####" keyAlias ​​"####" keyPassword "#####"} }}  

Can anyone help?