"My $aaa your $bbb string"
-----
Groovy script
  Compound Gstring
    PsiElement(Gstring begin)('"')
    GrStringContentImpl(GString content element)
      PsiElement(Gstring content)('My ')
    GString injection
      PsiElement($)('$')
      Reference expression
        PsiElement(identifier)('aaa')
    GrStringContentImpl(GString content element)
      PsiElement(Gstring content)(' your ')
    GString injection
      PsiElement($)('$')
      Reference expression
        PsiElement(identifier)('bbb')
    GrStringContentImpl(GString content element)
      PsiElement(Gstring content)(' string')
    PsiElement(Gstring end)('"')