"Get durability of item in slot S of block at position XYZ" procedure

Currently, there is no way to determine the durability/damage of an object inside the inventory of a block. A procedure to return the durability (and preferably max durability too) of an object in a specific slot of a block at position XYZ, similar to the "Deal X damage to item in slot S of block at position XYZ" procedure. Since we have a way to modify the damage, we should also have a way to read the damage.