active:attachDependency
<instr> <type>attachDependency</type> <operand>var:resource</operand> <param>var:dependency</param> <target>var:veryDependentResource</target></instr>
NetKernel provides a dependency based cache. In general accessors automatically accumulate the dependencies on any results they generate. In some obscure situations it is useful to add additional dependencies to a resource.