textKerning([kerning])
Returns the current kerning and sets it if argument kerning is given.
Type: function
Parameter(s):
- kerning {Number} Optional:
The value to set.
 
Returns:
- 
    {Number}:
The current kerning.
 
Returns the current kerning and sets it if argument kerning is given.
Type: function
Parameter(s):
The value to set.
Returns:
The current kerning.