Doc should reflect where variables can be used as function inputs

Discussion created by l_allen_poole on Jul 11, 2018
Latest reply on Jul 12, 2018 by CamelCase_data

Could the documentation be updated to reflect where variables can now be used where functions used to require a field reference? Even in the FMA 17 doc, for example, it still says that GetContainerAttribute's first argument must be "the name of a container field," when in fact it can also be a variable containing a file.