nl_tokens: Digs into an an initializer or RHS operand of an assignment operation to get the parameters of an apt signature corresponding to a function expression or a class expression .
pl_tokens: function getParametersFromRightHandSideOfAssignment ( rightHandSide ) { while ( rightHandSide . kind === 172 /* ParenthesizedExpression */ ) { rightHandSide = rightHandSide . expression ; } switch ( rightHandSide . kind ) { <mask> 173 /* FunctionExpression */ : case 174 /* ArrowFunction */ : return rightHandSide . parameters ; case 186 /* ClassExpression */ : for ( var _i = 0 , _a = rightHandSide . members ; _i < _a . length ; _i ++ ) { var member = _a [ _i ] ; if ( member . kind === 144 /* Constructor */ ) { return member . parameters ; } } break ; } return emptyArray ; }