func (g *GraphDefinitionRequest) GetChangeType() string {
	if g == nil || g.ChangeType == nil {
		return ""
	}
	return *g.ChangeType
}
func (g *GraphDefinitionRequest) GetChangeType() string {
	if g == nil || g.ChangeType == nil {
		return ""
	}
	return *g.ChangeType
}
// GetChangeType returns the ChangeType field if non-nil, zero value otherwise.