Atlassian JIRA
| FilterCallContext | A place to stuff away context if you need them back during filter step execution |
| FilterStep | An interface defining steps that can be done as a compound filter step. |
| ChainedFilterStepRunner | A Filter that consists of a chain of filter steps to run. |
| FilterCallContextImpl | |
| NullFilterStep | A filter step that doesn't do anything at all. |