public Block withId(String id) {
        setId(id);
        return this;
    }
<p>
Unique identifier for the block.
</p>

@param id
       Unique identifier for the block.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-comprehend/src/main/java/com/amazonaws/services/comprehend/model/Block.java