public void setField(String field) {
        this.field = field;
    }
<p>
The field to apply the placement strategy against. For the spread placement strategy, valid values are instanceId
(or host, which has the same effect), or any platform or custom attribute that is applied to a container
instance, such as attribute:ecs.availability-zone. For the binpack placement strategy, valid values are cpu and
memory. For the random placement strategy, this field is not used.
</p>

@param field
       The field to apply the placement strategy against. For the spread placement strategy, valid values are
       instanceId (or host, which has the same effect), or any platform or custom attribute that is applied to a
       container instance, such as attribute:ecs.availability-zone. For the binpack placement strategy, valid
       values are cpu and memory. For the random placement strategy, this field is not used.
aws-java-sdk-pipes/src/main/java/com/amazonaws/services/pipes/model/PlacementStrategy.java