Adding a variant to the basket from a virtual catalog

/// VirtualCatalogName: ABCD , BaseCatalogName: EFGH, 

/// ProductId 1234 , VariantId: XYZ
Incorrect code: add(“ABCD”, “1234(EFGH)”, “XYZ”, 1)

Correct code: add(“ABCD”, “1234(EFGH)”, “XYZ(EFGH)”, 1)

P.S: found by Mr. Shepherd