<s>[INST] returns the top symbol from the stack . concode_field_sep Symbol[] stack concode_elem_sep int pos concode_elem_sep ActionHandler symbolHandler concode_field_sep Symbol popSymbol concode_elem_sep int depth concode_elem_sep void processImplicitActions concode_elem_sep void pushSymbol concode_elem_sep void reset concode_elem_sep void expandStack concode_elem_sep void processTrailingImplicitActions concode_elem_sep Symbol doAction concode_elem_sep void pushProduction concode_elem_sep Symbol advance [/INST] Symbol function ( ) { return stack [ pos - 1 ] ; </s>