question: private void processConsumersForInputs ( Lop node , ArrayList < Instruction > inst , ArrayList < Instruction > delteInst ) throws DMLRuntimeException { for ( Lop in : node . getInputs ( ) ) { if ( DMLScript . ENABLE_DEBUG_MODE ) { processConsumers ( in , inst , delteInst , node ) ; } else { processConsumers ( in , inst , delteInst , null ) ; } } }
target:  Generate rmvar instructions for the inputs, if their consumer count becomes zero.