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