http://docs.groovy-lang.org/latest/html/groovy-jdk/java/io/InputStream.html
http://docs.groovy-lang.org/latest/html/api/org/codehaus/groovy/runtime/IOGroovyMethods.html

multiline.eachLine { line, count ->
    if (count == 0) {
        println "line $count: $line"  // Output: line 0: Groovy is closely related to Java,
    }
}