use interface in ColumnDefinition

[sixinli]

it seems like since https://github.com/JSQLParser/JSqlParser/pull/1274/files#diff-7a533138e54adbf0baac5356d4b7d4a6d192300199ef50eede004f706fd35de3R104 ColumnDefinition accepts ExpressionVisitorAdapter

JSqlParser/src/main/java/net/sf/jsqlparser/statement/create/table/ColumnDefinition.java

Lines 104 to 106 in c89cf21

	public void accept(ExpressionVisitorAdapter expressionVisitor) {
	expressionVisitor.visit(this);
	}

is it possible to have it take one of the interfaces instead?

(just noticed also, they seem to be referencing each other, ExpressionVisitorAdapter#visit calls ColumnDefinition#accept)

[manticore-projects]

Greetings,

this seems to have been cleaned up with revision commit 288b177 in PR #1778 already.