docs: public final EObject ruleAssignableTerminal() throws RecognitionException {
          EObject current = null;
  
          EObject this_Keyword_0 = null;
  
          EObject this_RuleCall_1 = null;
  
          EObject this_ParenthesizedAssignableElement_2 = null;
  
          EObject this_CrossReference_3 = null;
  
  
  
          	enterRule();
  
          try {
              // InternalXtext.g:2490:2: ( (this_Keyword_0= ruleKeyword | this_RuleCall_1= ruleRuleCall | this_ParenthesizedAssignableElement_2= ruleParenthesizedAssignableElement | this_CrossReference_3= ruleCrossReference ) )
              // InternalXtext.g:2491:2: (this_Keyword_0= ruleKeyword | this_RuleCall_1= ruleRuleCall | this_ParenthesizedAssignableElement_2= ruleParenthesizedAssignableElement | this_CrossReference_3= ruleCrossReference )
              {
              // InternalXtext.g:2491:2: (this_Keyword_0= ruleKeyword | this_RuleCall_1= ruleRuleCall | this_ParenthesizedAssignableElement_2= ruleParenthesizedAssignableElement | this_CrossReference_3= ruleCrossReference )
              int alt56=4;
              switch ( input.LA(1) ) {
              case RULE_STRING:
                  {
                  alt56=1;
                  }
                  break;
              case RULE_ID:
              case 39:
              case 40:
                  {
                  alt56=2;
                  }
                  break;
              case 15:
                  {
                  alt56=3;
                  }
                  break;
              case 45:
                  {
                  alt56=4;
                  }
                  break;
              default:
                  NoViableAltException nvae =
                      new NoViableAltException("", 56, 0, input);
  
                  throw nvae;
              }
  
              switch (alt56) {
                  case 1 :
                      // InternalXtext.g:2492:3: this_Keyword_0= ruleKeyword
                      {
  
                      			newCompositeNode(grammarAccess.getAssignableTerminalAccess().getKeywordParserRuleCall_0());
                      		
                      pushFollow(FollowSets000.FOLLOW_2);
                      this_Keyword_0=ruleKeyword();
  
                      state._fsp--;
  
  
                      			current = this_Keyword_0;
                      			afterParserOrEnumRuleCall();
                      		
  
                      }
                      break;
                  case 2 :
                      // InternalXtext.g:2501:3: this_RuleCall_1= ruleRuleCall
                      {
  
                      			newCompositeNode(grammarAccess.getAssignableTerminalAccess().getRuleCallParserRuleCall_1());
                      		
                      pushFollow(FollowSets000.FOLLOW_2);
                      this_RuleCall_1=ruleRuleCall();
  
                      state._fsp--;
  
  
                      			current = this_RuleCall_1;
                      			afterParserOrEnumRuleCall();
                      		
  
                      }
                      break;
                  case 3 :
                      // InternalXtext.g:2510:3: this_ParenthesizedAssignableElement_2= ruleParenthesizedAssignableElement
                      {
  
                      			newCompositeNode(grammarAccess.getAssignableTerminalAccess().getParenthesizedAssignableElementParserRuleCall_2());
                      		
                      pushFollow(FollowSets000.FOLLOW_2);
                      this_ParenthesizedAssignableElement_2=ruleParenthesizedAssignableElement();
  
                      state._fsp--;
  
  
                      			current = this_ParenthesizedAssignableElement_2;
                      			afterParserOrEnumRuleCall();
                      		
  
                      }
                      break;
                  case 4 :
                      // InternalXtext.g:2519:3: this_CrossReference_3= ruleCrossReference
                      {
  
                      			newCompositeNode(grammarAccess.getAssignableTerminalAccess().getCrossReferenceParserRuleCall_3());
                      		
                      pushFollow(FollowSets000.FOLLOW_2);
                      this_CrossReference_3=ruleCrossReference();
  
                      state._fsp--;
  
  
                      			current = this_CrossReference_3;
                      			afterParserOrEnumRuleCall();
                      		
  
                      }
                      break;
  
              }
  
  
              }
  
  
              	leaveRule();
  
          }
  
              catch (RecognitionException re) {
                  recover(input,re);
                  appendSkippedTokens();
              }
          finally {
          }
          return current;
      }