copy( source ) {

		super.copy( source );

		this.meshPerAttribute = source.meshPerAttribute;

		return this;

	}
Defines how often a value of this buffer attribute should be repeated. A
value of one means that each value of the instanced attribute is used for
a single instance. A value of two means that each value is used for two
consecutive instances (and so on).

@type {number}
@default 1