private void updateValue(String value) {
        this.value = Objects.requireNonNull(value, "String value cannot be null");
    }
Updates the value of the string node using the supplier returned
from {@link #createLazyString(String, SourceLocation)}.

@param value Value to set on the string node.
smithy-model/src/main/java/software/amazon/smithy/model/node/StringNode.java