question: whether str is a allow field concode_field_sep String Route concode_elem_sep String Via_short concode_elem_sep String Authentication_Info concode_elem_sep String CSeq concode_elem_sep String Require concode_elem_sep String Unsupported concode_elem_sep String To_short concode_elem_sep String User_Agent concode_elem_sep String Subject concode_elem_sep String Max_Forwards concode_elem_sep String From concode_elem_sep String Via concode_elem_sep String Content_Length concode_elem_sep String Date concode_elem_sep String Record_Route concode_elem_sep String Contact_short concode_elem_sep String Proxy_Require concode_elem_sep String Call_ID_short concode_elem_sep String Allow concode_elem_sep String Content_Length_short concode_elem_sep String To concode_elem_sep String WWW_Authenticate concode_elem_sep String Call_ID concode_elem_sep String From_short concode_elem_sep String Authorization concode_elem_sep String Proxy_Authenticate concode_elem_sep String Contact concode_elem_sep String Supported concode_elem_sep String Supported_short concode_elem_sep String Subject_short concode_elem_sep String Content_Type concode_elem_sep String Server concode_elem_sep String Alert_Info concode_elem_sep String Proxy_Authorization concode_elem_sep String Accept concode_elem_sep String Content_Type_short concode_elem_sep String Expires concode_field_sep boolean isCallId concode_elem_sep boolean isAccept concode_elem_sep boolean isAuthorization concode_elem_sep boolean isProxy_Authorization concode_elem_sep boolean isUser_Agent concode_elem_sep boolean isExpires concode_elem_sep boolean isContent_Type concode_elem_sep boolean isWWW_Authenticate concode_elem_sep boolean isAlert_Info concode_elem_sep boolean same concode_elem_sep boolean isRecord_Route concode_elem_sep boolean isContent_Length concode_elem_sep boolean isFrom concode_elem_sep boolean isMax_Forwards concode_elem_sep boolean isAuthentication_Info concode_elem_sep boolean isDate concode_elem_sep boolean isRequire concode_elem_sep boolean isRoute concode_elem_sep boolean isProxy_Require concode_elem_sep boolean isServer concode_elem_sep boolean isProxy_Authenticate concode_elem_sep boolean isCSeq concode_elem_sep boolean isSupported concode_elem_sep boolean isUnsupported concode_elem_sep boolean isTo concode_elem_sep boolean isSubject concode_elem_sep boolean isVia concode_elem_sep boolean isContact
target: boolean function ( String arg0 ) { return same ( arg0 , Allow ) ; }