@NotNull
  @Override
  public PsiElement getDelimiter() {
    PsiElement in = findChildByType(GroovyTokenTypes.kIN);
    if (in != null) return in;

    PsiElement colon = findChildByType(GroovyTokenTypes.mCOLON);
    return Objects.requireNonNull(colon);
  }
@NotNull
  @Override
  public PsiElement getDelimiter()