internal function for requesting an expression for an array of instruments. The function will initially try a snapshot request, and if this fails try a timeseries request.
myStaticRequestSet(
mydsws = dsws$new(),
instrument,
iExpression,
endDate = Sys.Date(),
frequency = "D"
)a dataframe of the
a dsws object, if not provided a new one will be created
array of instruments
an expression such as PCH#(XXXX,1M)
the date of the request
optional frequency defaults to "D"
Internal function