13. GDK Strings Lists Maps Groovy-aware methods Object Inspection Files and I/O Threads and Processes Biblioteca SQL XML Swing Ant Templates Groovlets Stubs and Mocks Lenguaje Literals Strings / Regex Lists / Maps / Ranges Closures Everything is an object Object Operators Multimethods GroovyBeans Meta Object Protocol Method Interception Category use (Mixin) Dynamic methods and properties Control Flow Groovy Truth Switch Advanced Operators Gpath Iterations Execution Scriptability Hot class reloading