int add(java.lang.Object)
void clear()
boolean contains(java.lang.Object)
java.lang.Object get(int)
com.aspose.cells.Column getByIndex(int)
com.aspose.cells.Column getColumnByIndex(int)
int getCount()
int indexOf(java.lang.Object)
java.util.Iterator iterator()
void removeAt(int)
com.aspose.cells.ColumnCollection