Sets or gets the gauge's properties for it's labels.
Possible Values:
position - specifies the gauge's labels position. Possible values for this property are 'far', 'near' and 'both'. If 'near' is used labels will be visible only in the left hand side of the ticks. If the 'far' value is set ticks will be visible only in the right hand side of the ticks. Otherwise, if the 'both' value is used the labels will be shown in both sides of the ticks
style - specifies the gauge's pointer style. Here you can set it's fill or stroke color
interval - specifies labels's frequency
offset - specifies labels's offset from the ticks
formatValue - callback used for formatting the label. This function accepts two parameters. The first one is the label's value and the second one is the label's position
visible - indicates whether the labels will be visible