package Ġcom . vn . nt es co . model . Response Ċ Ċ import Ġcom . google . gson . annotations . Expose Ċ import Ġcom . google . gson . annotations . SerializedName Ċ import Ġcom . vn . nt es co . model . Calculator Che mical Ċ import Ġcom . vn . nt es co . model . User Ċ Ċ class ĠUser Response : ĠNT es co Response () Ġ{ ĊĊĠĠĠ Ġ@ SerializedName (" data ") ĊĠĠĠ Ġ@ Expose ĊĠĠĠ Ġval Ġdata Ġ: ĠUser ? Ġ= Ġnull ; Ċ }