Common Params

Key Common Params in
Portfolio refers to an optional object of type KeySet that holds a set of Key-Value pairs (K₁,V₁), (K₂,V₂), ..., where the Keys K₁, K₂, ... are a subset of the input expected by the Create function of the Deriscope Type defined in the key Tradable Type
The Create function will be invoked R times, where R is the number of elements in each
array contained in the Values of the Key-Value pairs defined in the key Varying Params
At each such invocation, the Create function will be fed with an input consisting of the union of the pairs (K₁,V₁), (K₂,V₂), ... and the varying Key-Value pairs sourced from the arrays in the key Varying Params