question: log a warn message concode_field_sep int STACK_TRACE_START_INDEX concode_field_sep void debug concode_elem_sep String formatClassAndMethodName concode_elem_sep Logger getLogger concode_elem_sep String getFullyQualifiedClassName concode_elem_sep void error concode_elem_sep void info concode_elem_sep void fatal
target: void function ( Object arg0 ) { getLogger ( ) . warn ( formatClassAndMethodName ( ) + arg0 ) ; }