I am trying to extract the residual variance from the lmer function in the
package lme4.

For example, I have the following response from lmer:

Random effects:
>  Groups                  Name            Variance    Std.Dev.
>  Cell.line:DNA.extract (Intercept)  0.130554    0.36132
>  Residual                                    *0.018595*     0.13636


I want to extract 0.018595 from this output.

VarCorr allows me to extract the variance 0.130554, but I want to be able
to extract the Residual variance and I don't see a function that does this
in lme4.  Any ideas?

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