Could not find method flavor1ReleaseImplementation()

Question

Why can't I use it like this?

dependencies{
    flavor1ReleaseImplementation(name: "XXXA", ext: "aar")
    flavor2ReleaseImplementation(name: "XXXB", ext: "aar")
}

A problem occurred evaluating project ':app'.
> Could not find method flavor1ReleaseImplementation() for arguments [{name=XXXA, ext=aar}] on object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.

My Gradle Version

classpath 'com.android.tools.build:gradle:3.6.2'
...
distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip

Answer 1

Solved, see here

android{
    productFlavors {
        flavor1{}
    }
}

configurations {
    flavor1DebugImplementation
    flavor1DebugImplementation
}