<p>
Determines whether the target object is null or not.
</p>

@return true if the target object is null, false if not.
173950
public static final Function<Integer,Boolean> isNull() {
        return (Function<Integer,Boolean>)((Function)FnObject.isNull());
    }
1151974
public static boolean isNull(Cursor cursor, String columnName) {
        return cursor != null && cursor.isNull(cursor.getColumnIndex(columnName));

    }
1364740
public boolean isUnknown(Object value)
	{
		return value == null || (value instanceof Set ? ((Set) value).isEmpty() : false);
	}
318821
public static boolean isNullOrEmpty(Object obj) {
        if (obj == null)
            return true;
        if (obj instanceof String) {
            return (((String) obj).isEmpty());
        }
        if (obj instanceof Map) {
            return ((Map) obj).isEmpty();
        }
        if (obj instanceof List) {
            return ((List) obj).isEmpty();
        }
        if (obj instanceof Set) {
            return ((Set) obj).isEmpty();
        }
        return false;
    }
213784
protected boolean isLeaf() {

        for (int i = 0; i < entries.length; i++) {
            Entry entry = entries[i];
            if (entry.getChild() != null) {
                return false;
            }
        }

        return true;
    }
259379
public boolean isNull(int index) {
		Object value = opt(index);
		return value == null || value == JSONObject.NULL;
	}
1093701
public static final Function<Short,Boolean> isNotNull() {
        return (Function<Short,Boolean>)((Function)FnObject.isNotNull());
    }
160358
public static boolean isNull( Object obj ) {
      if( obj instanceof JSONObject ){
         return ((JSONObject) obj).isNullObject();
      }
      return JSONNull.getInstance()
            .equals( obj );
   }
1174630
@SuppressFBWarnings(justification = "Accepting that this is a bad practice - but made more sense in this use case",
            value = {"NP_BOOLEAN_RETURN_NULL"})
    public Boolean isExperimentalEnabled() {
        return (line != null && line.hasOption(ARGUMENT.EXPERIMENTAL)) ? true : null;
    }
1159892
public boolean isLeader() {
    MemberId leader = this.leader;
    return leader != null && leader.equals(cluster.getMember().memberId());
  }
1328329
public boolean isNullable()
    {
        for (int i = 0; i < this.getKeyFields(); i++)
        {
            if (this.getKeyField(i).getField(DBConstants.FILE_KEY_AREA).isNullable())
                return true;    // Is nullable
        }
        return false;   // is not nullable
    }
1326499
public static boolean isNullOrEmpty(@Nullable String string)
  {
    if (string == null || string.isEmpty())
    {
      return true;
    }
    return false;
  }
355576
public boolean isPoint(){
		if (start == null || end == null) {
			return false;
		}
		return start.compareTo(end) == 0 && isStartInclusive && isEndInclusive;
	}
351757
public ResultMatcher isNotNull() {
        return new AbstractResultMatcher(path, configuration) {
            public void doMatch(Object actual) {
                isNotNull(actual);
            }
        };
    }
786556
public static final Function<Double,Boolean> isNotNull() {
        return (Function<Double,Boolean>)((Function)FnObject.isNotNull());
    }
585319
def _is_null(self, value):
        """"""
        if isinstance(value, six.string_types):
            if not len(value.strip()):
                return True
        return value is None
905015
public boolean isLeaf()
    {
        NodeData data = (NodeData)this.getUserObject();
        if (data != null)
            return data.isLeaf();
        return false;
    }