Visibility control of Button and Button choices in TM Freight Booking application

Hi,

I have 3 button choices under button - 'Insert Package' in TM Freight booking application under 'Cargo Management' Tab.

Displaying the number of button choices is controlled based on 'Consolidation Type' field value under 'General Data' Tab. If consolidation type is FCL - 3 button choices are displayed and if it is LCL, 2 button choices are displayed.

I would like to know the exact class where is the code written to control this button choice visibility.

Please help.

Thanks,

Bharath.