Modify header of Issue IssueTableWebComponent

Hi,

I used class IssueTableWebComponent to build a table of issue.
I used class IssueTableLayoutBean to setup the layout for table.
Something like this

IssueTableLayoutBean layout = new IssueTableLayoutBean(columns, Collections.emptyList());
    layout.setSortingEnabled(false);
    layout.setDisplayHeader(true);
    layout.setShowExteriorTable(false);
    layout.setTableCssClass("");
    layout.setShowActionColumn(true);
    layout.setDisplayHeaderPager(true);
    layout.setShowTableEditHeader(true);

I want to modify the header of issue table.
For Ex: “Key” → will show “My key”

And this method "layout.setShowTableEditHeader(true); " what is purpose of this method?
Many thanks.