Returns HLC timestamp's logical counter
Removes a topmost item off the stack (an HLC timestamp) and pushes its logical counter as a 4-byte big-endian number.
PumpkinDB> HLC DUP HLC/LC SWAP HLC/TICK DUP HLC/LC SWAP HLC/TICK HLC/LC 0x00000000 0x00000001 0x00000002
Allocates for the logical counter to be pushed on stack.
EmptyStack error if there are less than one item on the stack
It will fail if the item is not an HLC timestamp.
lc : HLC HLC/TICK HLC/LC 0x00000001 EQUAL?. invalid_value : [1 HLC/LC] TRY UNWRAP 0x03 EQUAL?. empty_stack : [HLC/LC] TRY UNWRAP 0x04 EQUAL?.