Android : gradle source() don`t work in com.android.tools.build:gradle:0.11.+

I want build android using gradle. In android.tools.build:gradle:0.9.2 work source() for sourcesets. But android.tools.build:gradle:0.11.+ (or higher) dosen`t work source().

Could not find method source() for arguments [[ src ]] on source set main.

why can`t use source() for gradle:0.+?

android {
    sourceSets {
        mysource {
            java {
                srcDir '...'
                exclude '...'
            }
        }

        main {
            java {
                srcDir '...'
                source sourceSets.mysource.java
            }
        }
    }
}