public WorkspaceCreationProperties withCustomSecurityGroupId(String customSecurityGroupId) {
        setCustomSecurityGroupId(customSecurityGroupId);
        return this;
    }
<p>
The identifier of your custom security group.
</p>

@param customSecurityGroupId
       The identifier of your custom security group.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-workspaces/src/main/java/com/amazonaws/services/workspaces/model/WorkspaceCreationProperties.java