set_block_interval
Set the time interval between future blocks in the blockchain, in milliseconds.
If the timestamp for the next block has been explicitly set by calling rell.test.set_next_block_time() or `rell.test.set_next_block_time_delta(), the new interval does not take effect until after the next block.
Return
the previous interval value, in milliseconds
Since
0.13.3
Parameters
interval
the time interval between blocks