switch (k) {
case 1 expr1
default: println 'abc'
}
-----
Groovy script
  Switch statement
    PsiElement(switch)('switch')
    PsiWhiteSpace(' ')
    PsiElement(()('(')
    Reference expression
      PsiElement(identifier)('k')
    PsiElement())(')')
    PsiWhiteSpace(' ')
    PsiElement({)('{')
    PsiWhiteSpace('\n')
    Case section
      Case label
        PsiElement(case)('case')
        PsiWhiteSpace(' ')
        Literal
          PsiElement(Integer)('1')
        PsiErrorElement:':' expected
          <empty list>
      PsiWhiteSpace(' ')
      Reference expression
        PsiElement(identifier)('expr1')
    PsiElement(new line)('\n')
    Case section
      Case label
        PsiElement(default)('default')
        PsiElement(:)(':')
      PsiWhiteSpace(' ')
      Call expression
        Reference expression
          PsiElement(identifier)('println')
        PsiWhiteSpace(' ')
        Command arguments
          Literal
            PsiElement(string)(''abc'')
    PsiElement(new line)('\n')
    PsiElement(})('}')