PsiJavaFile:Reference1.java
  PsiJavaCodeReferenceElement:a.
    PsiJavaCodeReferenceElement:a
      PsiIdentifier:a('a')
      PsiReferenceParameterList
        <empty list>
    PsiJavaToken:DOT('.')
    PsiErrorElement:Identifier expected
      <empty list>
    PsiReferenceParameterList
      <empty list>