PyFile:FStringDeeplyNestedEmptyFragments.py
  PyAssignmentStatement
    PyTargetExpression: s
      PsiElement(Py:IDENTIFIER)('s')
    PsiWhiteSpace(' ')
    PsiElement(Py:EQ)('=')
    PsiWhiteSpace(' ')
    PyStringLiteralExpression: {:{:{:{}}}}
      PyFormattedStringNode
        PsiElement(Py:FSTRING_START)('f'')
        PyFStringFragment
          PsiElement(Py:FSTRING_FRAGMENT_START)('{')
          PsiErrorElement:expression expected
            <empty list>
          PyFStringFragmentFormatPart
            PsiElement(Py:FSTRING_FRAGMENT_FORMAT_START)(':')
            PyFStringFragment
              PsiElement(Py:FSTRING_FRAGMENT_START)('{')
              PsiErrorElement:expression expected
                <empty list>
              PyFStringFragmentFormatPart
                PsiElement(Py:FSTRING_FRAGMENT_FORMAT_START)(':')
                PyFStringFragment
                  PsiElement(Py:FSTRING_FRAGMENT_START)('{')
                  PsiErrorElement:expression expected
                    <empty list>
                  PyFStringFragmentFormatPart
                    PsiElement(Py:FSTRING_FRAGMENT_FORMAT_START)(':')
                    PyFStringFragment
                      PsiElement(Py:FSTRING_FRAGMENT_START)('{')
                      PsiErrorElement:expression expected
                        <empty list>
                      PsiElement(Py:FSTRING_FRAGMENT_END)('}')
                  PsiElement(Py:FSTRING_FRAGMENT_END)('}')
              PsiElement(Py:FSTRING_FRAGMENT_END)('}')
          PsiElement(Py:FSTRING_FRAGMENT_END)('}')
        PsiElement(Py:FSTRING_END)(''')