jill/src/main/java/io/github/agentsoz/jill/core/beliefbase/BeliefSet.java
public int getIndex(BeliefSetField field) {
    int index = -1;
    for (int i = 0; i < fields.length; i++) {
      if (field.equals(fields[i])) {
        index = i;
      }
    }
    return index;
  }
public int getIndex(BeliefSetField field) {
    int index = -1;
    for (int i = 0; i < fields.length; i++) {
      if (field.equals(fields[i])) {
        index = i;
      }
    }
    return index;
  }
Gets the index (column) of the given field in this belief set.

@param field the field for which the index is required
@return the index of that field, or -1 if not found
@since 0.3.4