API ScrollingMessageFrame SetTimeVisible

Set the time, lines added to a ScrollingMessageFrame are visible before they start to fade.
 ScrollingMessageFrame:SetTimeVisible(seconds);
----
;Arguments
:(Number seconds)
:;seconds : The time, lines added to the ScrollingMessageFrame are visible, before they start to fade.
----
;Returns
:;nil
----
;Example
 DEFAULT_CHAT_FRAME:SetTimeVisible(15);
;Result
 Changes the visible time for lines added or updated to 15 seconds.
==Details==
:SetTimeVisible(seconds) doesn't affect already visible lines, unless these are updated.
:A way to update them is to call one of the Scroll methods.
:Settings a value of 0 or below, means lines begin to fade immediately.
:Calling this method has the same affect as setting the ScrollingMessageFrame XML attribute "displayDuration".
:See also ScrollingMessageFrame:SetFading([isEnabled]) and ScrollingMessageFrame:SetFadeDuration(seconds).