code: def _compute_soil_amplification(cls, C, vs30, pga_rock, imt):
          
          return AtkinsonBoore2003SInterNSHMP2008._compute_soil_amplification(
              C, vs30, pga_rock, imt)
docs: Compute soil amplification (5th, 6th, and 7th terms in equation 1,
          page 1706) and add the B/C site condition as implemented by NSHMP.
  
          Call
          :meth:`AtkinsonBoore2003SInterNSHMP2008._compute_soil_amplification`