Explain the concept of AST transformations in Groovy and how they can be used for code generation and modification.

AST (Abstract Syntax Tree) transformations are a powerful feature in Groovy that allows developers to modify the code during the compilation phase. AST transformations operate on the abstract syntax tree of the code, enabling advanced code generation and modification capabilities. Let's delve into the concept of AST transformations in Groovy and explore how they can be used for code generation and modification. In Groovy, the compilation process involves several phases, including parsing the source code, building the abstract syntax tree (AST), and generating bytecode. AST transformations come into play during the AST transformation phase, where the AST is manipulated before generating bytecode. AST transformations in Groovy are implemented using annotations, which are applied to classes, methods, or fields. These annotations provide instructions to the Groovy compiler to perform specific transformations on the annotated code elements. The transformation process occurs automatically during compilation, making it a seamless and integrated part of the development workflow. The key benefits of using AST transformations are: 1. Code Generation: AST transformations allow developers to generate code dynamically during compilation. This is particularly useful for reducing boilerplate code and automating repetitive tasks. With AST transformations, dev....