get the prefix value . concode_field_sep String container concode_elem_sep String prefix concode_elem_sep String format concode_field_sep String container concode_elem_sep ExportRDBParametersInner withContainer concode_elem_sep ExportRDBParametersInner withFormat concode_elem_sep ExportRDBParametersInner withPrefix concode_elem_sep String format
String function ( ) { return this . prefix ; }