sse:sse_comment/2

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Predicate sse_comment/2

sse_comment(+Comment) is det
sse_comment(+Stream, +Comment) is det: Emit Comment as one or more SSE comment lines (: lines) followed by a blank line and flush the stream. Comments are ignored by clients and are mainly useful as a keep-alive heartbeat through intermediaries that close idle connections. Comment is an atom, string or list of lines; multi-line text is split as for data.