(double [][] ) 3
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Groovy script
  Typecast expression
    PsiElement(()('(')
    Array type
      Array type
        Built in type
          PsiElement(double)('double')
        PsiWhiteSpace(' ')
        PsiElement([)('[')
        PsiElement(])(']')
      PsiElement([)('[')
      PsiElement(])(']')
    PsiWhiteSpace(' ')
    PsiElement())(')')
    PsiWhiteSpace(' ')
    Literal
      PsiElement(Integer)('3')