function Declaration
BlockStatement#stmts: Array
ClassMethodBase#function: Fn? extension function for create Fn? -> FunctionDeclaration
DoWhileStatement#body: Statement? extension function for create Statement? -> FunctionDeclaration
ExportDeclaration#declaration: Declaration? extension function for create Declaration? -> FunctionDeclaration
ForInStatement#body: Statement? extension function for create Statement? -> FunctionDeclaration
ForOfStatement#body: Statement? extension function for create Statement? -> FunctionDeclaration
ForStatement#body: Statement? extension function for create Statement? -> FunctionDeclaration
IfStatement#alternate: Statement? extension function for create Statement? -> FunctionDeclaration
LabeledStatement#body: Statement? extension function for create Statement? -> FunctionDeclaration
Module#body: Array
Script#body: Array
SwitchCase#consequent: Array
TsModuleBlock#body: Array
WhileStatement#body: Statement? extension function for create Statement? -> FunctionDeclaration
WithStatement#body: Statement? extension function for create Statement? -> FunctionDeclaration