LegendBox.addKey

addKey(text, color[, lineWidth[, drawarea ]])

Add a custom entry to the legend box.

Argument	Default	Description
text	(Mandatory)	The text of the legend entry.
color	(Mandatory)	The icon color of the legend entry.
line	0	The line width for legend entry that represents lines in line charts.
drawarea	[Null	Object] A DrawArea containing the data symbol represents the legend entry. This is primarily used for legend entries in line charts with data symbols, or in scatter charts.

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