is_alive 
This method informs you whether a custom control for an object reference still exists at the frontend.
Syntax
CALL METHOD my_control->is_alive
RETURNING state = state.
End of the code.
Parameters
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Description
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state
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my_control->state_dead: Custom control is no longer active at the frontend my_control->state_alive: Custom control is active on the current screen. my_control->state_alive_on_other_dynpro: Custom control is not active on the current screen, but is still active (but invisible) at the frontend.
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