(script
  (interface_declaration
    name: (identifier)
    (type_parameters
      (type_parameter
        name: (identifier)))
    (extends_clause
      (type_specifier
        (qualified_identifier
          (identifier))
        (type_arguments
          (type_specifier
            (qualified_identifier
              (identifier))))))
    (where_clause
      (where_constraint
        constraint_left_type: (type_specifier
          (qualified_identifier
            (identifier)))
        constraint_right_type: (type_specifier
          (qualified_identifier
            (identifier)))))
    body: (member_declarations)))