in indigo.js [1016:1027]
IndigoObject.prototype.reactingCenter = function(reaction_bond) {
this.d._setSessionId();
if (reaction_bond === undefined || reaction_bond === null) {
return 0;
}
let value = alloc('int');
let res = this.d._checkResult(this.d._lib.indigoGetReactingCenter(this.id, reaction_bond.id, value));
if (res === null)
return null;
else
return value.deref();
};