package jmathlib.core.interfaces; import jmathlib.core.tokens.OperandToken; import jmathlib.core.tokens.Expression; import jmathlib.core.tokens.DataToken; public interface TreeCallback { public OperandToken evaluateFunction(OperandToken token, String options); public OperandToken evaluateFunction(Expression token, String options); public OperandToken evaluateFunction(DataToken token, String options); }