LIE ANALYSIS SYMBOL
Retrieve
Retrieve[instance,key]
retrieves the value associated with key in the class instance instance.
Retrieve[instance,{key1,key2,…}]
retrieves the values associated with keyi in the class instance instance.
Retrieve[{instance1,instance2,…},key]
retrieves the value associated with key in the class instances instancei.
Retrieve[key]
represents an operator form of Retrieve that can be applied to an expression.