PK_REGION_is_solid   

PK_ERROR_code_t     PK_REGION_is_solid
(
--- received arguments ---
PK_REGION_t         region,    --- the region

--- returned arguments ---
PK_LOGICAL_t *const is_solid   --- whether region is solid or void
)


This function returns PK_LOGICAL_true if the given region is solid and
PK_LOGICAL_false if it is void.