assert i == 1 :// "Bugoga!"
-----
Groovy script
  ASSERT statement
    PsiElement(assert)('assert')
    PsiWhiteSpace(' ')
    Relational expression
      Reference expression
        PsiElement(identifier)('i')
      PsiWhiteSpace(' ')
      PsiElement(==)('==')
      PsiWhiteSpace(' ')
      Literal
        PsiElement(Integer)('1')
    PsiWhiteSpace(' ')
    PsiElement(:)(':')
    PsiErrorElement:Expression expected
      <empty list>
  PsiComment(line comment)('// "Bugoga!"')