(Statements
  (Package
    (Identifier))
  (Function
    (Empty)
    (Identifier)
    (Statements)
    (Assignment
      (Identifier)
      (Reference
        (Composite
          (Identifier)
          (Statements
            (KeyValue
            { (Identifier)
            ->(Identifier) }
            { (Call
              {-(Identifier)-}
              {-(MemberAccess
                {-(Identifier)-}
                {-(Identifier)-})-}
              {-(Empty)-})
            ->(Identifier) })))))))