public void setKey(String key) {
        this.key = key;
    }
<p>
One part of a key-value pair that makes up a tag. A key is a general label that acts like a category for more
specific tag values.
</p>

@param key
       One part of a key-value pair that makes up a tag. A key is a general label that acts like a category for
       more specific tag values.
aws-java-sdk-resourcegroupstaggingapi/src/main/java/com/amazonaws/services/resourcegroupstaggingapi/model/TagFilter.java