get the ifunmodifiedsince value . concode_field_sep DateTimeRfc1123 ocpDate concode_elem_sep String clientRequestId concode_elem_sep DateTimeRfc1123 ifUnmodifiedSince concode_elem_sep Boolean returnClientRequestId concode_elem_sep DateTimeRfc1123 ifModifiedSince concode_elem_sep Integer timeout concode_elem_sep String ifNoneMatch concode_elem_sep String ifMatch concode_field_sep PoolUpgradeOSOptions withIfNoneMatch concode_elem_sep DateTime ocpDate concode_elem_sep String clientRequestId concode_elem_sep PoolUpgradeOSOptions withTimeout concode_elem_sep PoolUpgradeOSOptions withClientRequestId concode_elem_sep PoolUpgradeOSOptions withIfMatch concode_elem_sep DateTime ifModifiedSince concode_elem_sep Integer timeout concode_elem_sep String ifNoneMatch concode_elem_sep String ifMatch concode_elem_sep PoolUpgradeOSOptions withReturnClientRequestId concode_elem_sep PoolUpgradeOSOptions withOcpDate concode_elem_sep Boolean returnClientRequestId concode_elem_sep PoolUpgradeOSOptions withIfModifiedSince concode_elem_sep PoolUpgradeOSOptions withIfUnmodifiedSince
DateTime function ( ) { if ( this . ifUnmodifiedSince == null ) { return null ; } return this . ifUnmodifiedSince . getDateTime ( ) ; }