Gradle multiproject define dependency on root project

compile method is part of the plugin you've been using (reference).

allprojects {

    apply plugin: 'java'
    //so that we can use 'compile', 'testCompile' for dependencies

    dependencies {
        implementation 'org.projectlombok:lombok:1.12.2'
    }
}

If you got the 'java' plugin has been applied, but it is not compatible with the Android plugins error, try this

subprojects {
    afterEvaluate {
        dependencies {
            implementation "YOUR DEPENDENCIES"
        }
    }
}