Adds this spec’s require paths to LOAD_PATH, in the proper location.
Reset nil attributes to their default values to make the spec valid
@return [Object] most up-to-date dependency in the possibility set
@param [Object] possibility a single possibility @param [Array] requirements an array of requirements @return [Boolean] whether the possibility satisfies all of the
given requirements
Add the current {#possibility} to the dependency graph of the current {#state} @return [void]
@return [UnwindDetails] Details of the nearest index to which we could unwind
Attempts to update the existing vertex’s ‘PossibilitySet` with a filtered version @return [void]