def detailsType = BuildOperationTypes.detailsType(type)
        def roots = operations.roots.findAll {
            it.detailsType && detailsType.isAssignableFrom(it.detailsType) && predicate.isSatisfiedBy(it)
        }
        assert roots.size() == 1
        return roots[0]
    }

    @Override

            it.details.pluginClass == "Plugin1"
        }
        p1.details.targetPath == ":a"

        def children = operations.search(p1) {
            ApplyPluginBuildOperationType.Details.isAssignableFrom(it.detailsType)
        }

        children.size() == 1
        def p2 = children.first()

        p2.details.targetPath == ":b"
        p2.details.pluginClass == "Plugin2"
    }