The $2$-category of (small) groupoids is the full sub-$2$-category $\mathsf{Grpd}_{\mathsf{2}}$ of $\mathsf{Cats}_{\mathsf{2}}$ spanned by the groupoids.
The $2$-category of (small) groupoids is the full sub-$2$-category $\mathsf{Grpd}_{\mathsf{2}}$ of $\mathsf{Cats}_{\mathsf{2}}$ spanned by the groupoids.
