[GROOVY-10801] AST transform for simple utility classes (only static fields and methods) - ASF JIRA

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Similar to the @Category transform, I'd like to have a local transform for utility classes. Consider the following:

@Namespace
class C {
  int constant = 1
  def method() {
    // ...
  }
}

This would be Groovy shorthand for the canonical "utility class":

final class C {
  private C() { throw new AssertionError() }
  public static final int constant = 1
  static method {
    // ...
  }
}

Update: Like trait or record, we might consider taking this to the next step:

namespace C {
  int constant = 1
  def method() {
    // ...
  }
}