$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$
10.30
\begin{equation} \begin{gathered}\label{equation:reflective-localization-regular2} \xymatrix@C =50pt@R=50pt{ G(X) \times _{G(Z)} G(Z') \ar [r]^-{q'} \ar [d] & Y \times _{G(Z)} G(Z') \ar [r]^-{i'} \ar [d] & G(Z') \ar [d]^{g} \\ G(X) \ar [r]^-{q} & Y \ar [r]^-{i} & G(Z), } \end{gathered} \end{equation}