returns the name of the customer involved in this transaction . concode_field_sep double amount concode_elem_sep Date when concode_elem_sep String who concode_field_sep double amount concode_elem_sep int compare concode_elem_sep int compare concode_elem_sep int compare concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep String toString concode_elem_sep void main concode_elem_sep int compareTo concode_elem_sep Date when
String function ( ) { return who ; }