returns the authentication scheme , like basic . concode_field_sep String scheme concode_elem_sep String headerValue concode_elem_sep String realm concode_field_sep Credential authenticate concode_elem_sep int hashCode concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep boolean equals concode_elem_sep String getRealm concode_elem_sep String toString concode_elem_sep String toString concode_elem_sep Credential basic concode_elem_sep String getHeaderValue concode_elem_sep Credential authenticateProxy
String function ( ) { return scheme ; }