ext.libraries = [ // Groovy map literal
    spring_core: "org.springframework:spring-core:3.1",
    junit: "junit:junit:4.10"
]

dependencies {
    compile libraries.spring_core
    testCompile libraries.junit
}

libraries = [
    spring_core: dependencies.create("org.springframework:spring-core:3.1") {
        exclude module: "commons-logging"
        force = true
    }
]

libraries = [
    spring: [ // Groovy list literal
        "org.springframework:spring-core:3.1",
        "org.springframework:spring-jdbc:3.1"
    ]
]