Convert tf to struct

G11 = tf([1 2], [3 4]);
G12 = tf([3 4], [5 6 7]);
G21 = tf([8], [9 10]);
G22 = tf([11 12 13], [14 15 16 17]);
G = [G11, G12; G21, G22]
G =
 
  From input 1 to output...
        s + 2
   1:  -------
       3 s + 4
 
          8
   2:  --------
       9 s + 10
 
  From input 2 to output...
           3 s + 4
   1:  ---------------
       5 s^2 + 6 s + 7
 
           11 s^2 + 12 s + 13
   2:  ---------------------------
       14 s^3 + 15 s^2 + 16 s + 17
 
Continuous-time transfer function.
S(1,1) = struct(G(1,1));
Warning: Calling STRUCT on an object prevents the object from hiding its implementation details and should thus be avoided. Use DISP or DISPLAY to see the visible public details of an object. See 'help struct' for more information.
S(1,2) = struct(G(1,2));
Warning: Calling STRUCT on an object prevents the object from hiding its implementation details and should thus be avoided. Use DISP or DISPLAY to see the visible public details of an object. See 'help struct' for more information.
S(2,1) = struct(G(2,1));
Warning: Calling STRUCT on an object prevents the object from hiding its implementation details and should thus be avoided. Use DISP or DISPLAY to see the visible public details of an object. See 'help struct' for more information.
S(2,2) = struct(G(2,2));
Warning: Calling STRUCT on an object prevents the object from hiding its implementation details and should thus be avoided. Use DISP or DISPLAY to see the visible public details of an object. See 'help struct' for more information.
S
S = 2×2 struct array with fields:
    Numerator
    Denominator
    Variable
    IODelay
    Variable_
    ioDelayMatrix
    InputDelay
    OutputDelay
    Ts
    TimeUnit
    InputName
    InputUnit
    InputGroup
    OutputName
    OutputUnit
    OutputGroup
    Notes
    UserData
    u
    y
    TimeUnit_
    InputName_
    InputUnit_
    InputGroup_
    OutputName_
    OutputUnit_
    OutputGroup_
    Notes_
    CrossValidation_
    Name
    Name_
    IOSize_
    Version_
    SamplingGrid
    Data_
    SamplingGrid_