# Functions
FromBytes returns a Map or an error.
GetSpanFilterMapFromContext is a target for spanumsink.SinkFunc to be turned into a spanumsink.Sink.
GetSpanFilterMapOrNew is a target for spanumsink.SinkFunc to be turned into a spanumsink.Sink.
IsInvalid returns false if it's a Map with no invalid entries or nil, else true.
IsMap returns whether an error is an instance of Map.
ReturnInvalidOrError returns nil for a valid SpanFilter, an invalid SpanFilter or an error containing the bytes.
WithSpanFilterContext gives you a request with the Map set.
# Constants
OK valid spans.