question: get a collation key for two strings . the essential property of collation keys is that if two values are equal under the collation , then the collation keys are compare correctly under the equals method . concode_field_sep StringCollator baseCollator concode_field_sep int compareStrings concode_elem_sep boolean comparesEqual
target: Object function ( String arg0 ) { return baseCollator . getCollationKey ( arg0 ) ; }