Rows Grouping with separate heading for each group in ALV Output Webdynpro

Hi Experts,

I have a requirement to display my Web dynpro ALV Output having 30 rows.. In which I have to group few records with respective headings as shown below. I have the key to identify the Group now I am looking for how to display the group heading dynamically( In each group the number of rows will vary based on the user action).

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Quick responses will be appreciated.

Thanks