container.newElement("a", [1, 2], "b")
        container.newElement("b", [3, 4], null)
        expect:
        container.size == 1
        !container.hasMatchingConflict(val -> val == 2)
        container.hasMatchingConflict(val -> val == 3)
        container.popConflict().toString() == "a,b:3,4"
    }

    def "contains replacement conflict reversed"() {
        container.newElement("b", [3, 4], null)

                selected.addCause(moduleReplacement);
            }
        }
    }

    @Override
    public boolean hasKnownConflictFor(ModuleVersionIdentifier id) {
        return conflicts.hasMatchingConflict(state -> state.getId().equals(id));
    }

            conflictsByParticipant.remove(participant);
        }
        return conflict;
    }

    public boolean isEmpty() {
        return conflicts.isEmpty();
    }

    boolean hasMatchingConflict(Predicate<T> predicate) {
        if (isEmpty()) {
            return false;
        }
        return conflicts.stream().flatMap(conflict -> conflict.candidates.stream()).anyMatch(predicate);
    }