docs: public FactPattern getLHSParentFactPatternForBinding(final String var) {
          if (this.lhs == null) {
              return null;
          }
          for (int i = 0; i < this.lhs.length; i++) {
              IPattern pat = this.lhs[i];
              if (pat instanceof FromCompositeFactPattern) {
                  pat = ((FromCompositeFactPattern) pat).getFactPattern();
              }
              if (pat instanceof FactPattern) {
                  final FactPattern p = (FactPattern) pat;
                  if (p.getBoundName() != null && var.equals(p.getBoundName())) {
                      return p;
                  }
                  for (int j = 0; j < p.getFieldConstraints().length; j++) {
                      FieldConstraint fc = p.getFieldConstraints()[j];
                      List<String> fieldBindings = getFieldBinding(fc);
                      if (fieldBindings.contains(var)) {
                          return p;
                      }
                  }
              }
          }
          return null;
      }