@classmethod<EOL><INDENT>def inject(cls, span, obj):<DEDENT>
opentracing.tracer.inject(span, cls.FORMAT, obj['<STR_LIT>'])<EOL>
Injects the span context into a `carrier` object.

        :param opentracing.span.SpanContext span: the SpanContext instance
        :param Any obj: Object to use as context