"""Pre ${ a = b 
println "bugaga"
 3}
 ved"""
-----
Groovy script
  Compound Gstring
    PsiElement(Gstring begin)('"""')
    GrStringContentImpl(GString content element)
      PsiElement(Gstring content)('Pre ')
    GString injection
      PsiElement($)('$')
      Closable block
        PsiElement({)('{')
        PsiWhiteSpace(' ')
        Parameter list
          <empty list>
        Assignment expression
          Reference expression
            PsiElement(identifier)('a')
          PsiWhiteSpace(' ')
          PsiElement(=)('=')
          PsiWhiteSpace(' ')
          Reference expression
            PsiElement(identifier)('b')
        PsiWhiteSpace(' ')
        PsiElement(new line)('\n')
        Call expression
          Reference expression
            PsiElement(identifier)('println')
          PsiWhiteSpace(' ')
          Command arguments
            Literal
              PsiElement(Gstring)('"bugaga"')
        PsiElement(new line)('\n ')
        Literal
          PsiElement(Integer)('3')
        PsiElement(})('}')
    GrStringContentImpl(GString content element)
      PsiElement(Gstring content)('\n ved')
    PsiElement(Gstring end)('"""')