GET    /V1/configurable-products/:sku/children
DELETE /V1/configurable-products/:sku/children/:childSku
PUT    /V1/configurable-products/variation
POST   /V1/configurable-products/:sku/child
GET    /V1/configurable-products/:sku/options/:id
GET    /V1/configurable-products/:sku/options/all
POST   /V1/configurable-products/:sku/options
PUT    /V1/configurable-products/:sku/options/:id
DELETE /V1/configurable-products/:sku/options/:id
