async function evaluateBindExpression(expr, input, environment) {
        // The RHS is the expression to evaluate
        // The LHS is the name of the variable to bind to - should be a VARIABLE token (enforced by parser)
        var value = await evaluate(expr.rhs, input, environment);
        environment.bind(expr.lhs.value, value);
        return value;
    }
Evaluate bind expression against input data
@param {Object} expr - JSONata expression
@param {Object} input - Input data to evaluate against
@param {Object} environment - Environment
@returns {*} Evaluated input data