presto-main/src/main/java/io/prestosql/sql/relational/CallExpression.java/CallExpression/equals
class CallExpression:    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        CallExpression that = (CallExpression) o;
        return Objects.equals(resolvedFunction, that.resolvedFunction) &&
                Objects.equals(returnType, that.returnType) &&
                Objects.equals(arguments, that.arguments);
    }