return the boundary concode_field_sep String mimeType concode_elem_sep String charset concode_elem_sep Map parameters concode_elem_sep boolean contentTransferEncSet concode_elem_sep Log log concode_elem_sep String boundary concode_elem_sep String transferEncoding concode_elem_sep boolean contentTypeSet concode_field_sep boolean isMessage concode_elem_sep String getTransferEncoding concode_elem_sep boolean isBase64Encoded concode_elem_sep String getMimeType concode_elem_sep boolean isMimeType concode_elem_sep boolean isQuotedPrintableEncoded concode_elem_sep void addField concode_elem_sep Map getParameters concode_elem_sep String toString concode_elem_sep boolean isMultipart concode_elem_sep String getCharset concode_elem_sep Map getHeaderParams
String function ( ) { return boundary ; }