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GraphicsWidget displaying text.
Used mainly as axis labels, titles, etc.
Note: To display text inside a scaled view (ViewBox, PlotWidget, etc) use TextItem
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a CSS style string:
==================== ==============================
**Style Arguments:**
family (str) example: 'Cantarell'
color (str) example: '#CCFF00'
size (str) example: '8pt'
bold (bool)
italic (bool)
==================== ==============================
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