question: never use this method directly . concode_field_sep PlaceHolder placeHolder concode_field_sep String pop concode_elem_sep int getDepth concode_elem_sep void setMaxDepth concode_elem_sep void inherit concode_elem_sep void clear concode_elem_sep Stack cloneStack concode_elem_sep void push concode_elem_sep void remove concode_elem_sep String peek
target: String function ( ) { return org . apache . logging . log4j . ThreadContext . peek ( ) ; }