Attempts to parse an unknown value as a FileOutputRef by checking its shape.
Returns null if the value doesn't have the required fields (fileName, mimeType,
and either fileData or fileId).
Detection is shape-based, not name-based — works regardless of what the action
named its output parameter.
Attempts to parse an unknown value as a FileOutputRef by checking its shape. Returns null if the value doesn't have the required fields (fileName, mimeType, and either fileData or fileId).
Detection is shape-based, not name-based — works regardless of what the action named its output parameter.