nl_tokens: Set the value of a property to the current value minus some amount .
pl_tokens: function ( keyName , decrement ) { if ( Ember . isNone ( decrement ) ) { decrement = 1 ; } Ember . assert ( "Must pass a numeric value to decrementProperty" , ( ! isNaN ( parseFloat ( decrement ) ) && isFinite ( decrement ) ) ) ; <mask> ( this , keyName , ( get ( this , keyName ) || 0 ) - decrement ) ; return get ( this , keyName ) ; }