Character string to indicate which types of neighbors to return.
Defaults to "like" which returns a list of neighbors that are the same
district type (that is, unified to unified, elementary to elementary and
secondary to secondary). To view all neighbors use "all". This selection
becomes important for districts like Chicago which have upwards of 50
neighboring school districts, but only 1 type-like neighbor. Chicago is a unified
district and it has 1 neighbor that is also unified, 16 neighbors that are secondary
districts, and 32 neighbors that are elementary districts.