JsonPathFile
  JsonPathRootSegmentImpl(ROOT_SEGMENT)
    PsiElement($)('$')
  PsiElement(..)('..')
  JsonPathIdSegmentImpl(ID_SEGMENT)
    JsonPathIdImpl(ID)
      PsiElement(IDENTIFIER)('book')
  JsonPathExpressionSegmentImpl(EXPRESSION_SEGMENT)
    PsiElement([)('[')
    JsonPathSliceExpressionImpl(SLICE_EXPRESSION)
      PsiElement(INTEGER_NUMBER)('2')
      PsiElement(:)(':')
    PsiElement(])(']')