gistfile1.txt

package demo

import groovy.transform.CompileStatic

@CompileStatic
class Demo {

    void doit() {
        def c = {
            Map<String, String> data = [:]
            Map<String, Set<String>> otherData = [:]

            // GGTS marks the call to data.each with the following error...

            // Groovy:[Static type checking] - Cannot call <K,V> java.util.LinkedHashMap <java.lang.String, java.lang.String>#each(groovy.lang.Closure <java.lang.String>) 
            // with arguments [groovy.lang.Closure <java.util.Set>] 
            data.each { String k, String v ->

                // commenting out the following line allows the code to compile...
                def foo = otherData.get(k)
            }
        }
    }
}