question: returns true if the given username is a valid e-mail . concode_field_sep PersonValidator personValidator concode_elem_sep Log log concode_elem_sep Pattern EMAIL_PATTERN concode_field_sep boolean supports concode_elem_sep void validate concode_elem_sep boolean isUserNameValid
target: boolean function ( String arg0 ) { if ( StringUtils . isBlank ( arg0 ) ) { return false ; } Matcher loc0 = EMAIL_PATTERN . loc0 ( arg0 ) ; return loc0 . matches ( ) ; }