func (g *Graph) GetDefinitionOk() (GraphDefinition, bool) {
	if g == nil || g.Definition == nil {
		return GraphDefinition{}, false
	}
	return *g.Definition, true
}
func (g *Graph) GetDefinitionOk() (GraphDefinition, bool) {
	if g == nil || g.Definition == nil {
		return GraphDefinition{}, false
	}
	return *g.Definition, true
}
// GetDefinitionOk returns a tuple with the Definition field if it's non-nil, zero value otherwise
// and a boolean to check if the value has been set.