The getStyle() method

In the svg spec, section 19.3, there is an example of animation using
the SVG DOM.  In this example, there is the following line:

text_element.getStyle().setProperty("opacity", "opacity:" +
opacityfactor, "")

I was wondering where the getStyle() method is defined?  I have looked
and can't find this method anywhere.

Thanks
Kenneth Wallis
Software Developer
Corel Corporation

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