Returns the name of the style with ID @style_id defined by this @language.
a style ID.
the name of the style with ID @style_id defined by this @language or %NULL if the style has no name or there is no style with ID @style_id defined by this @language. The returned string is owned by the @language and must not be modified.
See Implementation
Returns the name of the style with ID @style_id defined by this @language.