This method gets the reference line object for axis O1. This object will only exist in a graph if the setDisplay(getReferenceLineO1(int), true) method is used to show the line.
Syntax:
IdentObj getReferenceLineO1(int);
where:
Is the identifier for the reference line, where 0 identifes the first reference line.
See getReferenceLineTextO1(), getReferenceLineY1(), APIs Related to Reference Lines.
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