The IMobSpawnerBaseLogic object contains all kinds of information on how and where to spawn something for mob spawners.

It might be required to import the class to avoid errors.
import crafttweaker.tileentity.IMobSpawnerBaseLogic;

ZenGetter	ZenSetter	Description	Type
ZenGetter nbtData	ZenSetter nbtData	Description NBT Data for the spawner. (See below)	Type IData
ZenGetter entityDefinition	ZenSetter entityDefinition	Description Entity Definition to be spawned.	Type IEntityDefinition
ZenGetter world	ZenSetter ​	Description World that the spawner belongs to.	Type IWorld
ZenGetter blockPos	ZenSetter ​	Description The position of the spawner block.	Type IBlockPos

ZenScript
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void updateSpawner(); // Updates the spawner for spawning an entity and ticking down the spawn timer.

void setDelayToMin(); // Sets the delay of the spawner to the minimum delay for the next spawn.