where is dynApply?

Hello, my documentation (sec-dynamic.html#SEC-DYNAMIC-UTIL, below) lists functions that I cannot find. I would like to use dynApply unless you give me a reason that I should not. (Could I implement this function myself without knowing internals?) Our installation GHC Interactive, version 5.02.3 has the ":info" for Dynamic but not for dynApply. Thanks in advance, Christian 5.11.3. Utility functions Operations for applying a dynamic function type to a dynamically typed argument are commonly useful, and also provided: dynApply :: Dynamic -> Dynamic -> Dynamic -- unsafe. dynApplyMb :: Dynamic -> Dynamic -> Maybe Dynamic