question: gets the expression of the then part at the given index . concode_field_sep List then concode_elem_sep Expression elseExpression concode_elem_sep Class type concode_field_sep Expression getElseExpression concode_elem_sep Class getType concode_elem_sep List getThen concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep Object clone concode_elem_sep int getWhenCount concode_elem_sep void setElseExpression concode_elem_sep String toString concode_elem_sep void setType concode_elem_sep void setWhen concode_elem_sep void setThen
target: Expression function ( int arg0 ) { return ( Expression ) then . get ( arg0 ) ; }