func (g *GraphDefinition) HasViz() bool {
	if g != nil && g.Viz != nil {
		return true
	}

	return false
}
func (g *GraphDefinition) HasViz() bool {
	if g != nil && g.Viz != nil {
		return true
	}

	return false
}
func ( g * GraphDefinition ) HasViz ( ) bool { if g != nil && g . Viz != nil { return true } return false }
// HasViz returns a boolean if a field has been set.
HasViz returns a boolean if a field has been set .