public void setExpression(String expression) {
        this.expression = expression;
    }
<p>
The expression that determines the formatting configuration for gradient color.
</p>

@param expression
       The expression that determines the formatting configuration for gradient color.
aws-java-sdk-quicksight/src/main/java/com/amazonaws/services/quicksight/model/ConditionalFormattingGradientColor.java