Internal
Resolve the SDMX agency for a dataflow.
IMF dataflow identifier (e.g. "WEO", "IFS").
"WEO"
"IFS"
SDMX agency string (e.g. "IMF", "OECD.SDD.STES").
"IMF"
"OECD.SDD.STES"
Resolve the SDMX agency for a dataflow.