returns the result of interpretting the object as an instance of ` item ' . this implementation returns null ; returning a non-null result will terminate the switch . concode_field_sep EPO2Package modelPackage concode_field_sep T caseGlobalLocation concode_elem_sep T caseSupplier concode_elem_sep T caseGlobalAddress concode_elem_sep T doSwitch concode_elem_sep T doSwitch concode_elem_sep T doSwitch concode_elem_sep T casePurchaseOrder concode_elem_sep T caseCustomer concode_elem_sep T caseUSAddress concode_elem_sep T caseAddress concode_elem_sep T defaultCase
T function ( Item arg0 ) { return null ; }