/// <summary>
        /// Updates the specified UnifiedGroupSource using PATCH.
        /// </summary>
        /// <param name="unifiedGroupSourceToUpdate">The UnifiedGroupSource to update.</param>
        /// <param name="cancellationToken">The <see cref="CancellationToken"/> for the request.</param>
        /// <exception cref="ClientException">Thrown when an object returned in a response is used for updating an object in Microsoft Graph.</exception>
        /// <returns>The updated UnifiedGroupSource.</returns>
        public async System.Threading.Tasks.Task <UnifiedGroupSource> UpdateAsync(UnifiedGroupSource unifiedGroupSourceToUpdate, CancellationToken cancellationToken)
        {
            if (unifiedGroupSourceToUpdate.AdditionalData != null)
            {
                if (unifiedGroupSourceToUpdate.AdditionalData.ContainsKey(Constants.HttpPropertyNames.ResponseHeaders) ||
                    unifiedGroupSourceToUpdate.AdditionalData.ContainsKey(Constants.HttpPropertyNames.StatusCode))
                {
                    throw new ClientException(
                              new Error
                    {
                        Code    = GeneratedErrorConstants.Codes.NotAllowed,
                        Message = String.Format(GeneratedErrorConstants.Messages.ResponseObjectUsedForUpdate, unifiedGroupSourceToUpdate.GetType().Name)
                    });
                }
            }
            if (unifiedGroupSourceToUpdate.AdditionalData != null)
            {
                if (unifiedGroupSourceToUpdate.AdditionalData.ContainsKey(Constants.HttpPropertyNames.ResponseHeaders) ||
                    unifiedGroupSourceToUpdate.AdditionalData.ContainsKey(Constants.HttpPropertyNames.StatusCode))
                {
                    throw new ClientException(
                              new Error
                    {
                        Code    = GeneratedErrorConstants.Codes.NotAllowed,
                        Message = String.Format(GeneratedErrorConstants.Messages.ResponseObjectUsedForUpdate, unifiedGroupSourceToUpdate.GetType().Name)
                    });
                }
            }
            this.ContentType = "application/json";
            this.Method      = "PATCH";
            var updatedEntity = await this.SendAsync <UnifiedGroupSource>(unifiedGroupSourceToUpdate, cancellationToken).ConfigureAwait(false);

            this.InitializeCollectionProperties(updatedEntity);
            return(updatedEntity);
        }