UnityEditor.TreeWizard.OnWizardUpdate C# (CSharp) Method

        internal override void OnWizardUpdate()
        {
            base.OnWizardUpdate();
            if (this.m_Tree == null)
            {
                base.errorString = "Please assign a tree";
                base.isValid = false;
            }
            else if (!this.m_IsValidTree)
            {
                base.errorString = "Tree has already been selected as a prototype";
                base.isValid = false;
            }
            else if (this.m_PrototypeIndex != -1)
            {
                this.DoApply();
            }
        }
    }