@Foo(def = 4)
def a
-----
Groovy script
  Variable definitions
    Modifiers
      Annotation
        PsiElement(@)('@')
        Reference element
          PsiElement(identifier)('Foo')
        Annotation arguments
          PsiElement(()('(')
          Annotation member value pair
            PsiElement(def)('def')
            PsiWhiteSpace(' ')
            PsiElement(=)('=')
            PsiWhiteSpace(' ')
            Literal
              PsiElement(Integer)('4')
          PsiElement())(')')
      PsiElement(new line)('\n')
      PsiElement(def)('def')
    PsiWhiteSpace(' ')
    Variable
      PsiElement(identifier)('a')