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							- <p> Location 3.0 and later provide a location_api_variant() function to aid in allowing add-on modules to support
 
- multiple releases, even if there are incompatible changes.</p>
 
- <h3>API variant 1</h3>
 
- <p>Start of API tracking. Based on Location 3.0.</p>
 
- <h3>API variant 2</h3>
 
- <p>location_diff() renamed to location_calc_difference() because diff.module was trying to invoke it as a hook.</p>
 
- <p>Before: Call location_diff().</p>
 
- <p>Now: Call location_calc_difference().</p>
 
 
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