Different keyStore for different product flavors in Gradle

I have different productFlavors specified in my build.gradle file

 dev {
            applicationId "com.advancedprogressive.chare.dev"
            versionCode 83
            versionName "2.2.1"
        }
staging {
            applicationId "com.advancedprogressive.chare.qa"
            versionCode 119
            versionName "2.8.1"
        }

and have have signing configurations like

signingConfigs {
        release {
            storeFile 
            storePassword 
            keyAlias 
            keyPassword         }
        debug {
            keyPassword 
            storeFile 
            keyAlias 
            storePassword 
        }
    }

I have different keystors for both flavors. I can specify different keystores for different build types e.g debug/release but how can i specify different keysotre for each flavor.

You can use somenthing like this:

android {
    signingConfigs {
        dev {
        }

        staging {
        }
    }

    productFlavors {
        dev {
            signingConfig signingConfigs.dev
        }

        staging {
            signingConfig signingConfigs.staging
        } 
    }
}