question: logs a message at warn level . usage example : logger.warn `` something bad happened when connecting to % s : % d '' , host , port ; if the format string is invalid or the arguments are insufficient , an error will be logged and execution will continue . concode_field_sep java.util.logging.Logger logger concode_field_sep void debug concode_elem_sep void debug concode_elem_sep void debug concode_elem_sep void debug concode_elem_sep boolean isInfoEnabled concode_elem_sep Logger get concode_elem_sep Logger get concode_elem_sep String rawMessageFor concode_elem_sep boolean isDebugEnabled concode_elem_sep void error concode_elem_sep void error concode_elem_sep void error concode_elem_sep void error concode_elem_sep void error concode_elem_sep boolean isVerboseEnabled concode_elem_sep void verbose concode_elem_sep void verbose concode_elem_sep void verbose concode_elem_sep void verbose concode_elem_sep void info concode_elem_sep void info concode_elem_sep void info concode_elem_sep String illegalFormatMessageFor
target: void function ( String arg0 , Object ... arg1 ) { warn ( null , arg0 , arg1 ) ; }