From Tapestries MUCK

null

{null:expr...}

Returns a null string, no matter what the expressions within it return.

This can take up to nine arguments, though you could pass the output of several commands as one argument.

uses

This can be used for inserting comments in code, example:

{null:Now we save the key}

This can be used for making noisy MPI silent, example:

{null:{store:SomeValue,SomeProp}}