PsiJavaFile:Binary4.java
  PsiPolyadicExpression: a**
    PsiReferenceExpression:a
      PsiReferenceParameterList
        <empty list>
      PsiIdentifier:a('a')
    PsiJavaToken:ASTERISK('*')
    PsiErrorElement:Expression expected
      <empty list>
    PsiJavaToken:ASTERISK('*')
    PsiErrorElement:Expression expected
      <empty list>