Add some class factory function to ease declaration of simple POU libraries in customizations (i.e. TC6 XML file only, no special C code generation)
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/*
Web interface is build as SVG file in Inkscape.
To edit SVG file click 'Inkscape' button on the toolbar above.
Inkscape is a free and open-source vector graphics editor.
It's not part of Beremiz and needs to be installed separately.
*/
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