checks if a value is a valid e-mail address according to a certain regular expression . concode_field_sep String EMAIL_ADDRESS_PATTERN concode_elem_sep Pattern s_aPattern concode_field_sep String getUnifiedEmailAddress
boolean function ( @ Nullable final String arg0 ) { if ( arg0 == null ) return false ; final String loc0 = getUnifiedEmailAddress ( arg0 ) ; return s_aPattern . matcher ( loc0 ) . matches ( ) ; }