coins.ast.stmnt
クラス 
BreakStmnt
CaseLabel
CompoundStmnt
ContinueStmnt
DefaultLabel
DoStmnt
ExpressionStmnt
ForStmnt
GotoStmnt
IfStmnt
LeafStmnt
NamedLabel
NullStmnt
ReturnStmnt
SwitchStmnt
TreeStmnt
WhileStmnt