The FROM option is used with a style element in order to inherit from another style
element. If you omit the FROM option, then you can have an incomplete style element
in the child style.
For example, in the following SAS program, the style Concepts.Style2 inherits all of its
style elements and style attributes from the style Concepts.Style1. However, the instance
of the style element Colors in Concepts.Style2 overrides ...
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