Is it possible to make an entry in field of ALV GRID mandatory

Hello Experts,
I have a requirement in which I have an ALV TREE . In that tree I have folders and nodes . There are descriptions for nodes.
In one description I have somethng like
'Sender' '-->' 'Receiver'.( whihc I am passing to the tree from an outside class where it gets computed )
But the client wants to replace the '-->' symbol with an icon or some special characters. T
The problem is I am doing the Concatenating operation
data r_description type char256.
CALL FUNCTION 'ICON_CREATE'
    EXPORTING
      name                        = '@04@'
     text                        =   'Receiver'
   IMPORTING
     RESULT                      = l_text
EXCEPTIONS
    ICON_NOT_FOUND              = 1
    OUTPUTFIELD_TOO_SHORT       = 2
    OTHERS                      = 3
Concatenate 'Sender' l_text into r_description separated by space .
here l_text is fine . But when I concatenate 'Sender' at the beginning it gets unformated and icons special characters are appearing instead of icons.
Any idea How could i possibly do this ?

Hi Arshad,
I checked , it will not work
Concatenate 'Sender' l_text into r_description separated by space . "Will not work
The icon in the beggining will only get displayed,
Concatenate l_text 'Sender' into r_description separated by space . "Will work
Wait for experts replies.:)

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