message: force bond compute for sequence positions with micro-heterogeneity
  see e.g. 3NIR
diff: @@ -37,9 +37,11 @@ function _computeBonds(unit: Unit.Atomic, props: BondComputationProps): IntraUni
  const { x, y, z } = unit.model.atomicConformation;
  const atomCount = unit.elements.length;
  - const { elements: atoms, residueIndex } = unit;
  + const { elements: atoms, residueIndex, chainIndex } = unit;
  const { type_symbol, label_atom_id, label_alt_id } = unit.model.atomicHierarchy.atoms;
  - const { label_comp_id } = unit.model.atomicHierarchy.residues;
  + const { label_comp_id, label_seq_id } = unit.model.atomicHierarchy.residues;
  + const { index } = unit.model.atomicHierarchy;
  + const { byEntityKey } = unit.model.sequence;
  const query3d = unit.lookup3d;
  const structConn = StructConn.Provider.get(unit.model);
  @@ -101,7 +103,13 @@ function _computeBonds(unit: Unit.Atomic, props: BondComputationProps): IntraUni
  if (!props.forceCompute && raI !== lastResidue) {
  if (!!component && component.entries.has(compId)) {
  + const entitySeq = byEntityKey[index.getEntityFromChain(chainIndex[aI])];
  + if (entitySeq && entitySeq.sequence.microHet.has(label_seq_id.value(raI))) {
  + // compute for sequence positions with micro-heterogeneity
  + componentMap = void 0;
  + } else {
  componentMap = component.entries.get(compId)!.map;
  + }
  } else {
  componentMap = void 0;
  }
  