incorrect external workspace assumption

[comicfans]

I tried to import bazel source code using bazel-eclipse,

https://github.com/eclipseguru/bazel-eclipse/blob/0f60e45de15e2a14a8b6cda046b69c0ed169b4e7/bundles/com.salesforce.bazel.eclipse.core/src/com/salesforce/bazel/eclipse/core/model/BazelWorkspace.java#L473-482

public BazelWorkspace getExternalWorkspace(IPath externalRoot) throws IllegalArgumentException, CoreException {
        if (!getInfo().getOutputBase().isPrefixOf(externalRoot)) {
            throw new IllegalArgumentException(
                    format(
                        "The external workspace at '%s' is not rooted in the output base of workspace '%s'!",
                        externalRoot,
                        getLocation()));
        }
        return new BazelWorkspace(externalRoot, this);
    }

it assume external workspace should live under externalRoot, which is incorrect, for example bazel/third_party/remoteapis live under main repo directory