sets the block from which the arrow originates to sourceblock concode_field_sep double endAt concode_elem_sep DataElementBlock destinationBlock concode_elem_sep String destination concode_elem_sep double startAt concode_elem_sep DataElementBlock sourceBlock concode_elem_sep String source concode_field_sep DataElementBlock getDestinationBlock concode_elem_sep void setDestinationBlock concode_elem_sep void setEndAt concode_elem_sep DataElementBlock getSourceBlock concode_elem_sep String getDestination concode_elem_sep boolean isOnLine concode_elem_sep String getSource concode_elem_sep double getStartAt concode_elem_sep double getEndAt concode_elem_sep void setStartAt concode_elem_sep void drawArrow
void function ( DataElementBlock arg0 ) { this . sourceBlock = arg0 ; }