char[][] tokens = new char[length][];
this.identifierPtr -= length;
System.arraycopy(this.identifierStack, this.identifierPtr + 1, tokens, 0, length);
long[] positions = new long[length];
System.arraycopy(this.identifierPositionStack, this.identifierPtr + 1, positions, 0, length);
ref = new QualifiedNameReference(
tokens,
positions,
(int) (this.identifierPositionStack[this.identifierPtr + 1] >> 32), // sourceStart
(int) this.identifierPositionStack[this.identifierPtr + length]); // sourceEnd
ref.bits &= ~ASTNode.RestrictiveFlagMASK;